Program for computing Area, Volume and Perimeter of Rrectangle.

#include

void inputoutput ()
{
int comp,ans;
clrscr ();
printf ("choose please: 1=perimeter,2=area,3=volume] ?: ");
scanf ("%d",&comp);
if (comp==1)
{
int le, wi;
printf ("Enter the length: ");
scanf ("%d",≤);
printf ("Enter the width: ");
scanf ("%d",&wi);
printf ("P=%d",perimeter(le,wi));
}
else if (comp==2)
{
int le, wi;
printf ("Enter the length: ");
scanf ("%d",≤);
printf ("Enter the width: ");
scanf ("%d",&wi);
printf ("A=%d", area(le,wi));
}
else if (comp==3)
{
int length,width,height;
printf ("Enter lenght: ");
scanf ("%d",&length);
printf ("Enter width: ");
scanf ("%d",&width);
printf ("Enter height: ");
scanf ("%d",&height);
printf ("V=%d",volume (length,width,height));
}

else inputoutput ();
printf ("
Do you want to continue? [Yes=1/No=0]: ");
scanf ("%d",&ans);
if (ans==1)
inputoutput ();
else printf ("GOOD Day");
}
int perimeter (int l, int w)
{
int per;
per=(l*2)+(w*2);
return (per);

}
int area (int le, int wi)
{
int are;
are=le*wi;
return (are);
}
int volume (int length, int width, int height)
{
int vol;

vol=(length*width*height);
return (vol);
}



main ()
{
clrscr ();
inputoutput ();
getch ();
}

Related Links :

Program to correct rudimentary syntax errors

#include
# include
#define NULL 0
FILE *fpt;
void main()
{
int c1=0,c2=0,c3=0,c4=0,c5=0;
char c,name[20],z;
clrscr();
printf("Enter the name of file to be checked :- ");
gets(name);
fpt=fopen(name,"r");
if (fpt==NULL)
printf("
ERROR - can/'t open file %s",name);
else
{
while ((c=getc(fpt))!=EOF)
{
if (c=='(')
c1=c1+1;
if (c==')')
c1=c1-1;
if (c=='[')
c2=c2+1;
if (c==']')
c2=c2-1;
if (c=='
')
{
if (c1!=0)
printf("
ERROR - Unbalanced parenthesis ()");
if (c2!=0)
printf("
ERROR - Unbalanced brackets []");
}
if (c=='{')
c3=c3+1;
if (c=='}')
c3=c3-1;
if ((int)c==39)
{
if (c1!=0)
{
if (c4==0)
c4=c4+1;
else
c4=c4-1;
}
else
printf("
ERROR - Unbalanced ' ");
}
if ((int)c==34)
{
if (c1!=0)
{
if (c5==0)
c5=c5+1;
else
c5=c5-1;
}
else
{
z=(char)34;
printf("
ERROR - Unbalanced %c ",z);
}
}
}
}

if (c1!=0)
printf("
ERROR - Unbalanced parenthesis ()");
if (c2!=0)
printf("
ERROR - Unbalanced brackets []");
if (c3!=0)
printf("
ERROR - Unbalanced braces {}");
if (c4!=0)
printf("
ERROR - Unbalanced ' ");
if (c5!=0)
printf("
ERROR - Unbalanced " ");

if (c1==0 && c2==0 && c3==0 && c4==0 && c5==0)
printf("
Program is up to date. WELL DONE!");
fclose(fpt);
getch();
}

Related Links :

Invoke function without main in C Language

#include
#include

#define FIRST 0
#define SECOND 1
#define THIRD 2


//Variables
int a,b,c,ch;
float d;
//Function Prototype
void Read();
void Operation();
void Display();

#pragma startup Read 0 //First_Priority
#pragma startup Operation 1 //Second_Priority
#pragma exit Display //Third_Priority

void main()
{
printf("

Enter to main() ");
getch();
printf("Exit From main() ");
getch();
}

void Read()
{
clrscr();
printf("
Enter the value of a : ");
scanf("%d",&a);
printf("
Enter the value of b : ");
scanf("%d",&b);
}

void Operation()
{
printf("ArithMetic Operations");
printf("---------------------");
printf("1 -> Addition ");
printf("2 -> Subtraction");
printf("3 -> Multiplication");
printf("---------------------");
scanf("%d",&ch);
switch(ch)
{
case 1:
c = a+b;
break;
case 2:
c = a-b;
break;
case 3:
c = a*b;
break;
}
}

void Display()
{
switch(ch)
{
case 1:
printf("The Result (Addition) : %d",c);
break;
case 2:
printf("

The Result (Subtraction): %d",c);
break;
case 3:
printf("

The Result (Multiplication): %d",c);
break;
}
getch();
}

Related Links :

Program to convertion of number to letters

#include
#include
#include
char tens[15][15]={{""},{""},{"Twenty "},{"Thirty "},{"Fourty "},{"Fifty
"},{"Sisty "},{"Seventy "},{"Eighty "},{"Ninty "}};
char one[25][15]={{""},{"One "},{"Two "},{"Three "},{"Four "},{"Five
"},{"Six "},{"Seven "},{"Eight "},{"Nine "},{"Ten "},{"Eleven "},{"Twelve
"},{"Thirteen "},{"Fourteen "},{"Fifteen "},{"Sisteen "},{"Seventeen
"},{"Eighteen "},{"Nineteen "}};
char out[150];
int n[10]={0},i,temp1=0,temp;
long int num,f;
void convert(int i)
{

if(i==7)
{
strcat(out,one[n[i]]);
strcat(out,"Crore ");
}
if(i==6||i==4||i==1)
{
if(n[i]==1)
temp1=n[i]*10;
if(i==1&&n[0]!=0&&f>1)
strcat(out," And ");
strcat(out,tens[n[i]]);
}
if((i==5||i==3||i==0||i==2))
{
if(temp1!=0)
{
temp1+=n[i];
if(i==0&&n[i+1]!=0&&n[i+2]==0&&f>1)
strcat(out," And ");
strcat(out,one[temp1]);
}
else
{
if(i==0&&n[i+1]!=0&&n[i+2]==0&&f>1)
strcat(out," And ");
strcat(out,one[n[i]]);
}
if(n[i]!=0||temp1!=0||n[i+1]!=0)
switch(i)
{
case 5:strcat(out,"Lakh ");break;
case 3:strcat(out,"Thousand ");break;
case 2:strcat(out,"Hundred ");
if(n[i]==0)
strcat(out," And ");
}
temp1=0;
}

}

void main()
{
int i=0,j;
char c[2];
clrscr();
c[1]='

Related Links :

CPU Scheduling algorithm implementation

#include
#include
#include
#include
#include


union REGS i, o ;
int x1,y1,click;
int count=1;
char *comments[]={
" ",
"Opps ?...Try it again!",
"C give yourself a chance!",
"Yes!! You can do it !",
"Think about 1 Million!",
"Don't give up Friend !",
"Ohhh... LOOSER..!!",
"Sorry..You loose !"
};

void main()
{

int x=50,y=50,gdriver = 9, gmode=2;
initgraph(&gdriver, &gmode, "c:\tc\bgi");
setcolor(LIGHTRED);
settextstyle(TRIPLEX_FONT,HORIZ_DIR,3);
outtextxy(240,200,"Developed by :");
outtextxy(240,250,"WWW");
rectangle(210,170,420,300);
settextstyle(DEFAULT_FONT,HORIZ_DIR,1);
outtextxy(200,400,"Press any key to continue.........");
getch();
cleardevice();


showmouseptr();
setbkcolor(9); //sets the backgroundcolour.
setcolor(YELLOW);
outtextxy(20,445,"CLICK ON THE BUTTON "IGCT"");
unpressed(290,430,"EXIT");
unpressed(x,y,"IGCT");

while(1)//infinite loop.
{

getmousepos();

if(x1 >= x && x1 <= x+50 && y1 >= y && y1 <= y+30 )//checks if the
mouse pointer is over the button.
{ //where
x,x+50,y,y+50 are ((x,y))top,(x,y)bottom)co-ordinates.
hidemouseptr();
erasebutton(x,y);
x=random(600);
y=random(400);
//checks whether count=1 so as to display the button on the new
position for only once.

setcolor(9);
outtextxy(380,445,comments[count-1]);//to erase previousely written
things
setcolor(YELLOW);
outtextxy(380,445,comments[count]);
count++;

if(count==9)
{
setcolor(9);
outtextxy(380,445,comments[8]);//to erase previousely written
things
setcolor(YELLOW);
outtextxy(380,445,comments[1]);
count=2;
}

unpressed(x,y,"IGCT");
showmouseptr();


}
if(x1>=290&&x1<=340&&y1>=430&&y1<=460 && click==1)//checks if the mouse
pointer is over the "EXIT" button.
{ //for click==1 refer
to mousepos.h.
hidemouseptr();
pressed(290,430,"EXIT");
showmouseptr();
sound(1200);
delay(100);
nosound();
while(click!=0)
getmousepos();
break;
}

}

closegraph();
restorecrtmode();
}

unpressed(int x,int y,char *string) //display's an unpressed button.

{

setfillstyle(SOLID_FILL,CYAN);//sets the fill pattern and colour.
bar(x, y, x+50, y+30);//creates a box and the box is automatically
filled with the chosen colour.
setcolor(LIGHTCYAN);
line(x,y,x+50,y);//creates a white line just over the box.
line(x,y,x,y+30);

setcolor(EGA_DARKGRAY);
line(x,y+30,x+50,y+30);//creates a dark line just below the box.
line(x+2,y+31,x+50,y+31);
line(x+50,y,x+50,y+30);
line(x+51,y,x+51,y+31);
setcolor(BLUE);
outtextxy(x+10,y+12,string);//displays text on the box.
return 0;
}


pressed(int x,int y,char *string)

{
setfillstyle(SOLID_FILL,CYAN);
bar(x, y, x+50, y+30);
setcolor(EGA_DARKGRAY);
line(x,y,x+50,y);
line(x-1,y-1,x+51,y-1);
line(x,y,x,y+30);
line(x-1,y-1,x-1,y+30);

setcolor(LIGHTCYAN);
line(x,y+30,x+50,y+30);
line(x-1,y+31,x+50,y+31);
line(x+50,y,x+50,y+30);
line(x+51,y-1,x+51,y+31);

setlinestyle(DOTTED_LINE,1,NORM_WIDTH);
setcolor(EGA_DARKGRAY);
rectangle(x+4,y+4,x+46,y+26);//creates a dotted rectangle over the
box.
setcolor(BLUE);
outtextxy(x+10,y+12,string);
return 0;
}

erasebutton(int x,int y)//erases button.

{


setfillstyle(SOLID_FILL,getbkcolor());//gets the background colour


bar(x, y-1, x+51, y+31); // and fills the box with the
SOLID_FILL pattern.
return 0;
}

showmouseptr( ) //shows the mouse-pointer.

{

i.x.ax = 1 ;

int86 ( 0x33, &i, &o ) ;
return 0;
}
hidemouseptr()//hides the mouse pointer.
{
i.x.ax=2;
int86(51,&i,&o);//note:-0x33(hex)÷51(dec).
return 0;
}

getmousepos() //finds the mouse-pointer position.

{


i.x.ax = 3 ;

int86 ( 0x33, &i, &o ) ;

click = o.x.bx ;// if the left click button is pressed then click=1.

x1 = o.x.cx ; //x co-ordinate.

y1 = o.x.dx ; //y co-ordinate.

return 0;
}

Related Links :

Decimal to Binary, Octal and HEX converter

#include
#include
#define MAX 79
#define ESC 27
void main()
{
char res,r;
int i,k=0,y;
long j=0,l=0,o=0;
textcolor(15);
for(i=0;i<5000;i++)
cprintf(" ");
while(1)
{
clrscr();
printf("Enter Any Number To Be Converted : ");
scanf("%ld",&j);
l=j;
o=l;
k=0;
if(j>2145555550)
{
textcolor(4);
gotoxy(15,5);
cprintf("The Number Is Greater Than Range");
textcolor(15);
getch();
goto end;
}
else
{
gotoxy(1,6);
printf("Binary Equivalent:-");
y=MAX;
while(j>0)
{
k=j%2;
j=j/2;
gotoxy(y,6);
y--;
printf("%d",k);
}
gotoxy(1,8);
printf("Hexadecimal Equivalent:- ");
y=MAX;
while(l>0)
{
k=l%16;
l=l/16;
gotoxy(y,8);
y--;
if(k<=9)
{
printf("%d",k);
}
if(k==10)
{
printf("A");
}
if(k==11)
{
printf("B");
}
if(k==12)
{
printf("C");
}
if(k==13)
{
printf("D");
}
if(k==14)
{
printf("E");
}
if(k==15)
{
printf("F");
}
}
gotoxy(1,10);
printf("Octal Equivalent:- ");
y=MAX;
while(o>0)
{
k=o%8;
o=o/8;
gotoxy(y,10);
y--;
printf("%d",k);
}
}
gotoxy(15,25);
printf("Press Any Key To Continue , ESC To Exit");
res=getch();
if(res==ESC)
{
break;
}
}
end:
textcolor(7);
for(i=0;i<5000;i++)
cprintf(" ");
clrscr();
}

Related Links :

Calendar Program

#include

int day(int m1,int y1)
{
int d;
if(m1==1 || m1==3 || m1==5 || m1==7 || m1==8 || m1==10 || m1==12)
d=31;
else if(m1==4 || m1==6 || m1==9 || m1==11)
d=30;
else if((y1%100!=0 && y1%4==0) || y1%400==0)
d=29;
else
d=28;
return d;
}

void main()
{
long unsigned int t;
unsigned int y,y1,m,m1,d,da,i,j,k;
char
a[12][20]={"January","February","March","April","May","June","July","Augus
t","September","October","November","December"};
clrscr();
textcolor(CYAN);
cprintf("Enter the year: ");
scanf("%4u",&y);
if(y<0)
y=-y;
cprintf("
Enter the month: ");
scanf("%2u",&m);
if(m<=0 || m>=13)
m=1;
clrscr();
gotoxy(32,2);
cprintf("Calendar");
y1=0;
t=0;
while(y1
{
if((y1%100!=0 && y1%4==0) || y1%400==0)
t=t+366;
else
t=t+365;
y1++;
}
m1=1;
while(m1
{
d=day(m1,y);
t=t+d;
m1++;
}
d=t%7;
printf("

Year: '%u'",y);
printf("
Month: '%s'

",a[m-1]);

printf("%6s%6s%6s%6s%6s%6s%6s

","Sun","Mon","Tue","Wed","Thu","Fri","Sa
t");
textcolor(GREEN);
k=1;
for(i=1;i<=day(m,y);i++,k++)
{
if(i==1)
{
if(d==0)
{
for(j=1;j<7;j++,k++)
printf("%6s","");
}
else
{
for(j=1;j
printf("%6s","");
}
}
cprintf("%6d",i);
if(k%7==0)
printf("

");
}
gotoxy(27,22);
cprintf("www");

getch();
}

Related Links :

Calender Program in C

#include
#include
#include
#include

unsigned long days=0;
//stores the days elapsed since 01.01.1899
void display(int n)
//contains the number of days to display
{
int i, column, k, flag=0, j;
printf("Sun Mon Tues Wed Thur Fri Sat
");
for(i=1; i<=n; i++)
{
k=days%7;//remainder gives the starting day of each month
if(flag==0)
{
for(j=1; j<=k; j++)//controls tabs of first week
printf(" ");
flag=1;//ensures that block is only executed once
column=k;
}
printf("%d ", i);
column++;
if(column%7==0)//prints new line at the end of each week
printf(" ");
}
printf(" Press any key to continue");
getch();
}

void calculate(int year)
//function calculates no. of days elapsed since 1899
{
int i, month;
for(i=1899; i
//1899 chosen because Jan 1, 1899 is a Sunday
{
if((i%400==0)?1:((i%100==0)?0:((i%4==0)?1:0)))

days+=366;
else
days+=365;
}
for(month=1; month<=12; month++)
{
printf("


");
switch(month)
/*switch case used to display each month and
increment no. of days*/
{
case 1: printf(" JANUARAY %d", year);
display(31);
days+=31;
break;
case 2: printf(" FEBURARY %d", year);
if((year%400==0)?1:((year%100==0)?0:((year%4==0)?1:0)))
{
display(29);
days+=29;
}
else
{
display(28);
days+=28;
}
break;
case 3: printf(" MARCH %d", year);
display(31);
days+=31;
break;
case 4: printf(" APRIL %d", year);
display(30);
days+=30;
break;
case 5: printf(" MAY %d", year);
display(31);
days+=31;
break;
case 6: printf(" JUNE %d", year);
display(30);
days+=30;
break;
case 7: printf(" JULY %d", year);
display(31);
days+=31;
break;
case 8: printf(" AUGUST %d", year);
display(31);
days+=31;
break;
case 9: printf(" SEPTEMBER %d", year);
display(30);
days+=30;
break;
case 10: printf(" OCTOBER %d", year);
display(31);
days+=31;
break;
case 11: printf(" NOVEMBER %d", year);
display(30);
days+=30;
break;
case 12: printf(" DECEMBER %d", year);
display(31);
days+=31;
break;
}
}
}

void main()
{
char ch[10];
int i, year, choice;
do
{
clrscr();
days=0;
printf("Enter the year in 'yyyy' format:
");
scanf("%s", ch);//stores input first as a string
for(i=0; i
if(ch[i]<'0' || ch[i]>'9')//checks for invalid inputs
{
printf("

Invalid Year!");
printf("

END OF PROGRAM");
getch();
exit(0);
}
year = atoi(ch);
//converts the year from string to integer datatype
clrscr();
printf("

Calender for Year %d", year);
printf("
**********************

");
calculate(year);
//calls function to calculate no. of days elapsed

printf("
*******************************************
");
printf("

Press 1 to continue, 2 to exit
");
scanf("%d", &choice);
}while(choice==1);
clrscr();
printf("

END OF PROGRAM");
getch();
}

Related Links :

Calendar of Thousands of Years

#include
#include
static char *months[]={"January",
"February",
"March",
"April",
"May",
"June",
"July",
"August",
"September",
"October",
"November",
"December"};
void main()
{
static int days[12]={31,28,31,30,31,30,31,31,30,31,30,31};
long int ndays,ldays,tydays,tdays;
int d,i,m,fday,y;
char ch;
textcolor(LIGHTGREEN);
textbackground(LIGHTBLUE);
clrscr();
printf("Please Enter year(1900 onwards) & month(number):");
scanf("%d%d",&y,&m);
while(1)
{
ndays=(y-1)*365l;
ldays=(y-1)/4-(y-1)/100+(y-1)/400;
tdays=ndays+ldays;//total days
//check for the leap year
if((y%100==0 && y%400==0)||(y%4==0 && y%100!=0))
days[1]=29;
else
days[1]=28;
d=days[m-1];
tydays=0;
for(i=0;i<=m-2;i++)
tydays=tydays+days[i];
tdays=tydays+tdays;
fday=tdays%7;
cal(y,m,fday,d);
ch=getche();
switch(ch)
{
case 77:
if(m==12)
{
y++;
m=1;
}
else
m++;
break;
case 72:
y++;
continue;
case 75:
if(m==1)
{
y--;
m=12;
}
else
m--;
break;
case 80:
y--;
continue;
case 27:
exit(0);
}}}
cal(int yr,int mo,int fd,int da)
{
int i,r,c;
char a;
clrscr();
gotoxy(25,2);
printf("%s %d",months[mo-1],yr);
textcolor(LIGHTGREEN);
gotoxy(5,5);
printf("____________________________________________________");
gotoxy(10,6);
printf("MON TUE WED THU FRI SAT SUN");
gotoxy(5,7);
printf("____________________________________________________");
r=9;
c=11+(6*fd);
for(i=1;i<=da;i++)
{
gotoxy(c,r);
if(c==47)
textcolor(RED);
else
textcolor(LIGHTGREEN);
cprintf("%d",i);
if(c<=41)
c=c+6;
else
{
c=11;
r=r+1;
}
}
textcolor(LIGHTGREEN);
gotoxy(5,15);
printf("____________________________________________________");
gotoxy(11,17);
printf("UP-Next Year DOWN-Prev Year");
gotoxy(11,18);
printf("RIGHT-Next Month LEFT-Prev Month");
gotoxy(27,20);
printf("Esc-Exit");
return 0;
}

Related Links :

system programming in C

// understanding IVT table
#include
#include
main()
{
unsigned long far *address = (unsigned long far *)0x00000000;
unsigned long intadd[256];
unsigned int segment, offset;
int i;
FILE *fp;
fp = fopen("IVT.txt", "wb");
for(i = 0; i <>
{
intadd[i] = *(address++);
segment = FP_SEG(intadd[i]);
offset = FP_OFF(intadd[i]);
fprintf(fp, "interrupt %3X : vector %Fp(hex) : %lu(dec)",i, intadd[i], (unsigned long)segment * 16 + offset);
}
fclose(fp);
}

Related Links :

Convert decimal to binary

#include

void dec_bin(int number);

int main(void)
{
int input = 0;

printf("Digit (0-255): ");
scanf("%d", &input);

(input >= 0) && (input < 256) ? dec_bin(input) : exit(1);

return 0;
}

void dec_bin(int number)
{
int x, y;
x = y = 0;

for(y = 7; y >= 0; y--)
{
x = number / (1 << y);
number = number - x * (1 << y);
printf("%d", x);
}

printf("\n");
}

Related Links :

program to find out total marks & Percentage of three subjects

void main ()

{

int m1,m2,m3;

float tm,per;

clrscr ();

printf ("Enter M1: ");

scanf ("%d",&m1);

printf ("Enter M2: ");

scanf ("%d",&m2);

printf ("Enter M3: ");

scanf ("%d",&m3);

tm=m1+m2+m3;

per=(tm/300*100);

printf ("\nTotal Marks are %.2f",tm);

printf ("\nPercentage is %.2f",per);

getch ();

}

Related Links :

Program to SWAP the three digit number

void main ()

{

int b,r,n,r1,r2;

clrscr ();

printf ("Enter the Value: ");

scanf ("%d",&n);

r=n%10;

n=n/10;

r1=n%10;

n=n/10;

r2=n%10;

n=n/10;

b=(r*100)*(r2*10)+(r2);

printf ("%d%d%d",r,r1,r2);

getch ();

}

Related Links :

Program To find sum of five elements of an array

void main ()

{

int no[5],i,sum;

clrscr ();

for (i=0;i<=4;i++)

{

printf ("Enter Element: ");

scanf ("%d",&no[i]);

}

sum=no[0]+no[1]+no[2]+no[3]+no[4];

printf ("\nSum of five Elements: %d",sum);

getch ();

}

Related Links :

A bubblesort routine

# include
# include
void bubblesort(int array[],int size);
void main()
{
int values[10],j;
for(j=0;j<10;j++)
values[j] = rand()%100;
/*unsorted*/
printf("\nUnsorted values.\n");
for(j=0;j<10;j++)
printf("%d ",values[j]);
/*sorted*/
printf("\nSorted values.\n");
bubblesort(values,10);
for(j=0;j<10;j++)
printf("%d ",values[j]);
}
void bubblesort(int array[],int size)
{
int tmp ,i,j;
for(i = 0;i for(j=0;j < size;j++)
if(array[i] < array[j])
{
tmp = array[i];
array[i] = array[j];
array[j] = tmp;
}
}

Related Links :

This program calculates an average of the numbers entered

#include
int Average(int i);

int main()
{
int num;
do
{
printf("Enter numbers.\n");
scanf("%d",&num);
if(num != -1)
printf("The average is %d", Average(num));
printf("\n");

}while(num>-1);

return 0;
}

int Average(int i)
{
static int sum = 0, count = 0;
sum = sum + i;
count++;
return sum / count;
}

Related Links :

Basic example showing constants usage in C

#include
/*constants for bonus rates and sales*/
#define BONUSRATE1 0.1
#define BONUSRATE2 0.15
#define BONUSRATE3 0.2
#define SALES1 2000
#define SALES2 5000
#define SALES3 10000
int main()
{
int sales;
double commission;
/*get employees sales*/
printf("Please enter your total sales to the nearest dollar.\n");
scanf("%d", &sales);
/*calculate employees bonus based on info*/
if(sales <=2000)
{
commission = sales * BONUSRATE1;
printf("%g\n" , commission);
}
else if(sales > 2000 && sales <=5000)
{
commission = sales * BONUSRATE2;
printf("%g\n" , commission);
}
else
{
commission = sales * BONUSRATE3;
printf("%g\n" , commission);
}

return 0;
}

Related Links :

A simple example showing some comparison operators

#include
int main()
{
int number1 , number2;
printf("Enter the number1 number to compare.\n");
scanf("%d",&number1);
printf("Enter the number2 number to compare.\n");
scanf("%d",&number2);
printf("number1 > number2 has the value %d\n", number1 > number2);
printf("number1 < number2 has the value %d\n", number1 < number2);
printf("number1 == number2 has the value %d\n", number1 == number2);
return 0;
}

Related Links :

count occurrences of values in an array.

#include
void print_arr(int grades[], int elements);
int count_passes(int grades[], int elements,int value);

int main(void)
{
int grades[10] = {70,80,95,65,35,85,54,78,45,68};
int result;
print_arr(grades,10);
result = count_passes(grades,10,70);
if(result == 1)
printf("There was %d pass.\n",result);
else
printf("There were %d passes.\n",result);
return 0;
}

void print_arr(int grades[], int elements)
{
int i;

for(i = 0;i < elements;i++)
{
printf("%d ",grades[i]);
}
printf("\n");
}

int count_passes(int grades[], int elements,int value)
{
int i ,passes = 0 ;
for(i = 0;i < elements;i++)
{
if(grades[i] >= value)
passes++;
}
return(passes);
}

Related Links :

Program to Open a file, read a file and write to a file

#include
int main()
{
float sales , commission;
FILE *fin, *fout;
fin = fopen("c:\\pop.dat","r");
fout = fopen("c:\\pop2.dat","w");
while (fscanf(fin,"%f",&sales) != EOF)
{
fprintf(fout,"Your sales for the year were %8.2f \n",sales);
if(sales < 30000)
commission = sales / 100 * 5;
else
commission = sales / 100 * 10;
fprintf(fout,"Your commission is %8.2f",commission);
}
return 0;
}

Related Links :

Program to find whether a number is odd or even

#include
int main()
{
int number ;
printf("Enter a whole number\n");
scanf("%d",&number);
if(number % 2 == 0)
printf("number is even.\n");
else
printf("number is odd.\n");

return 0;
}

Related Links :

calculate the power in watts

#include
int main()
{
float power,voltage,current;
voltage = current = 0;

printf("Power calculator.\n");
printf("This will calculate the power in watts , ");
printf("when you input the voltage and current.");
/*get the voltage*/
printf("Enter the voltage in volts.\n");
scanf("%f",&voltage);
/*get the current*/
printf("Enter the current in amps.\n");
scanf("%f",¤t);
/*calculate the power*/
power = voltage * current;
printf("The power in watts is %.2f watts\n",power);

return 0;
}

Related Links :

Ohms law example In C

#include
#include
#include
int main()
{
char ch;
float voltage , current , resistance , result;
printf("Ohms law calculator.\n");
printf("Please choose from following calculcations.\n");
printf("1. choose 1 to calculate the voltage.\n");
printf("2. choose 2 to calculate the current.\n");
printf("3. choose 3 to calculate the resistance.\n");
printf("Anything else to quit.\n");
scanf("%c",&ch);
switch(ch)
{
case '1' :
printf("please enter the current in amps.\n");
scanf("%f",¤t);
printf("Now enter the resistance in ohms.\n");
scanf("%f",&resistance);
result = current * resistance;
printf("The voltage is %0.2f volts.\n",result);
break;
case '2' :
printf("please enter the voltage in volts.\n");
scanf("%f",&voltage);
printf("Now enter the resistance in ohms.\n");
scanf("%f",&resistance);
result = voltage / resistance;
printf("The current is %0.2f amps.\n",result);
break;
case '3' :
printf("please enter the voltage in volts.\n");
scanf("%f",&voltage);
printf("Now enter the current in amps.\n");
scanf("%f",¤t);
result = voltage / current;
printf("The resistance is %0.2f ohms.\n",result);
break;
default :
exit(0);
break;
}
return 0;
}

Related Links :

Search an array

#include
void print_arr(int myArray[], int elements);
int search_arr(int myArray[], int elements, int number);

int main(void)
{
int myArray[10] = {12,23,56,35,18,65,12,87,73,9};
int result,number;
print_arr(myArray,10);
number = 65;
result = search_arr(myArray,10,number);
if(result == -1)
printf("%d was not found.\n",number);
else
printf("Found %d\n",result);
return 0;
}

void print_arr(int myArray[], int elements)
{
int i;

for(i = 0;i < elements;i++)
{
printf("%d ",myArray[i]);
}
printf("\n");
}

int search_arr(int myArray[], int elements, int number)
{
int i;
for(i = 0;i < elements;i++)
{
if(myArray[i] == number)
return(number);
}
return(-1);
}

Related Links :

program to calculate sum all of the elments in an array

#include
void print_arr(int myArray[], int elements);
int sum_arr(int myArray[], int elements);

int main(void)
{
int myArray[5] = {78,34,25,98,12 };
int sum;
printf("Array info: ");
print_arr(myArray,5);
sum = sum_arr(myArray,5);
printf("The sum of the array is : %d\n",sum);
return 0;
}

void print_arr(int myArray[], int elements)
{
int i;
for(i = 0;i < elements;i++)
{
printf("%d ",myArray[i]);
}
printf("\n");
}

int sum_arr(int myArray[], int elements)
{
int i, sum = 0;
for(i = 0;i < elements;i++)
{
sum = sum + myArray[i];
}
return(sum);
}

Related Links :

Square Root of a number by using simple calculations

#include
#include
main()
{
float a,b,e=0.00001,p,k;
clrscr();
textcolor(GREEN);
do {
printf("*******************************************************");
printf(" PROGRAM TO FIND SQUARE ROOT OF A NUMBERxDB
");
printf("*********************************************************");
cprintf("ENTER A NUMBER(-1 to Quit) :");
scanf("%f",&k);

a=k;p=a*a;
while(p-k>=e)
{
b=(a+(k/a))/2;
a=b;
p=a*a;
}
printf("SQUARE ROOT IS = %f",a);
getch();
clrscr();
}
while(k!=-1);
getch();
}

Related Links :

Program for conversion of Decimal to Roman Number

#include

main()
{
int a,b,c,d,e;
clrscr();
printf("Input a number (between 1-3000):");
scanf("%d",&e);
while (e==0||e>3000)
{
printf ("ERROR: Invalid Input!");
printf ("Enter the number again:");
scanf ("%d",&e);
}
if (e>3000)
printf("Invalid");
a = (e/1000)*1000;
b = ((e/100)%10)*100;
c = ((e/10)%10)*10;
d = ((e/1)%10)*1;

if (a ==1000)
printf("M");
else if (a ==2000)
printf("MM");
else if (a ==3000)
printf("MMM");

if (b == 100)
printf("C");
else if (b == 200)
printf("CC");
else if (b == 300)
printf("CCC");
else if (b == 400)
printf("CD");
else if (b ==500)
printf("D");
else if (b == 600)
printf("DC");
else if (b == 700)
printf("DCC");
else if (b ==800)
printf("DCCC");
else if (b == 900)
printf("CM");


if (c == 10)
printf("X");
else if (c == 20)
printf("XX");
else if (c == 30)
printf("XXX");
else if (c == 40)
printf("XL");
else if (c ==50)
printf("L");
else if (c == 60)
printf("LX");
else if (c == 70)
printf("LXX");
else if (c ==80)
printf("LXXX");
else if (c == 90)
printf("XC");

if (d == 1)
printf("I");
else if (d == 2)
printf("II");
else if (d == 3)
printf("III");
else if (d == 4)
printf("IV");
else if (d ==5)
printf("V");
else if (d == 6)
printf("VI");
else if (d == 7)
printf("VII");
else if (d ==8)
printf("VIII");
else if (d == 9)
printf("IX");
getch();
}

Related Links :

Progam that gives length of side of a Triangle

//Progam that gives all details of a Triangle given the lengths of its sides
#include
#include
#include
#include

main()
{
clrscr();
float a,b,c,S,D,A,B,C,Area,R;
printf("Enter the lengths of the three sides of the triangle :");
scanf("%f%f%f",&a,&b,&c);

S = (a+b+c)/2.0; // S is the semiperimeter of the triangle
D = S*(S-a)*(S-b)*(S-c);//D is the square of the area of the triangle
if(D<=0)
{
printf("The triangle cannot be formed");
getch();
exit(0);
}

if((a==b || b==c || c==a) && !(a==b && b==c && c==a))
// this complex logic is to eliminate interpretting a triangle with all
three
// sides equal as both isosceles and equilateral.
printf("The triangle is ISOSCELES");
if(a==b && b==c && c==a)
printf("The triangle is EQUILATERAL Type");
if(a!=b && b!=c && c!=a)
printf("The triangle is SCALENE");

Area = sqrt(D);
R = (a*b*c)/(4.0*Area);
printf("PERIMETER = %.2f units",(2.0*S));
printf("AREA = %.2f sq.units",Area);
printf("CIRCUM RADIUS = %.2f units",R);
// using sine rule,we get...
A = (180.0/3.1415926)*asin(a/(2.0*R));// value of pi should be upto 7
B = (180.0/3.1415926)*asin(b/(2.0*R));// decimal places of accuracy and
also
C = (180.0/3.1415926)*asin(c/(2.0*R));// note that the 7th decimal place
// 6 and not 7 as it had to be if were
if(A==90.0 || B==90.0 || C==90.0)
// approximated to 7 decimalplaces
printf("The triangle is RIGHT ANGLED");
if(A<90.0 && B<90.0 && C<90.0)
printf("The triangle is ACUTE ANGLED");
if(A>90.0 || B>90.0 || C>90.0)
printf("The triangle is OBTUSE ANGLED");

printf("The angles are as follows :");
printf("A = %.2f degrees",A);
printf("B = %.2f degrees",B);
printf("C = %.2f degrees",C);
printf("Where A,B,C stand for angles opposite to sides%.2f,%.2f,%.2f",a,b,c);
printf(" respectively");


getch();
return 0;
}

Related Links :

Program to construct a pyramid of any input numbers

main()
{
int n,row=1,col=40,i=0,j,k=0,count=1;
int a[10];
clrscr();
i=n-1;
printf("Pyramid of how many numbers? ");
scanf("%d",&n);
for (j=0;j\<=n;j++)
{
printf("Enter no.:- ");
scanf("%d",&a[j]);
}
clrscr();
for (row=n;row>=1;row--)
{
k=0;
k=40-(4*(row-1));
i=row-1;
for (col=40;col>=k;col=(col-4))
{
gotoxy(col,row);
printf("%d",a[i]);
--i;
}
}

for (count=n;count>=1;count--)
{
k=0;
k=40+(4*(count-1));
i=count-1;
for (col=40;col<=k;col=(col+4))
{
gotoxy(col,count);
printf("%d",a[i]);
--i;
}
}
getch();
}

Related Links :

Program to compute difference between two dates

#include "stdio.h"
#include "math.h"
void main()
{
int day1,mon1,year1,day2,mon2,year2;
int ref,dd1,dd2,i;
clrscr();
printf("Enter first day, month, year");
scanf("%d%d%d",&day1,&mon1,&year1);
scanf("%d%d%d",&day2,&mon2,&year2);
ref = year1;
if(year2ref = year2;
dd1=0;
dd1=func1(mon1);
for(i=ref;i{
if(i%4==0)
dd1+=1;
}
dd1=dd1+day1+(year1-ref)*365;
printf("No. of days of first date fronm the Jan 1 %d= %d",year1,dd1);
/* Count for additional days due to leap years*/
dd2=0;
for(i=ref;i{
if(i%4==0)
dd2+=1;
}
dd2=func1(mon2)+dd2+day2+((year2-ref)*365);
printf("No. of days from the reference year's first Jan = %d",dd2);
printf("Therefore, diff between the two dates is %d",abs(dd2-dd1));

getch();
}




int func1(x) //x for month y for dd
{ int y=0;
switch(x)
{
case 1: y=0; break;
case 2: y=31; break;
case 3: y=59; break;
case 4: y=90; break;
case 5: y=120;break;
case 6: y=151; break;
case 7: y=181; break;
case 8: y=212; break;
case 9: y=243; break;
case 10:y=273; break;
case 11:y=304; break;
case 12:y=334; break;
default: printf("Error encountered"); exit(1);
}
return(y);
}

Related Links :

Program for rotating circles using maths Function

#include "stdio.h"
#include "graphics.h>"
#include "conio.h>"
#include "dos.h"
#include "stdlib.h"
#include "math.h"
#include "iostream.h"
main()
{
int gd=DETECT,gm,x=295,y=222,a,j,i;
initgraph(&gd,&gm,"c:\tc\bgi");
setcolor(14);
outtextxy(x-10,y,"POP");
while(!kbhit())
{
i++;

delay(1);
setcolor(16);
circle(x+(200*cos(i)),y+(200*sin(i)),8);
setcolor(10);
circle(x+(200*cos(i+40)),y+(200*sin(i+40)),8);
//set2
setcolor(16);
circle(x+(160*sin(i)),y+(160*cos(i)),7); //anti clockwise:-sin,cos
interchanged
circle(x+(160*sin(i)),y+(160*cos(i)),5);
setcolor(i);
circle(x+(160*sin(i+40)),y+(160*cos(i+40)),7);
circle(x+(160*sin(i+40)),y+(160*cos(i+40)),5);

setcolor(16);
circle(x+(120*sin(i)),y+(120*cos(i)),6);//anti clockwise:-sin,cos
interchanged
setcolor(12);
circle(x+(120*sin(i+40)),y+(120*cos(i+40)),6);

setcolor(16);
circle(x+(90*cos(i)),y+(90*sin(i)),5);
setcolor(i);
circle(x+(90*cos(i+40)),y+(90*sin(i+40)),5);
}
getch();
return 0;
}

Related Links :

Print a double pyramid

void main(void)
{
clrscr();
int i,j,k,l,b,n;
printf("Enter the value of N:");
scanf("%d",&n);
for(i=0;i{
printf("");
for(l=0;l printf(" ");
for(j=i+1;j<=n;j++)
printf("%d",j);
for(k=n-1;k>i;k--)
printf("%d",k);
}
b=n-1;
for(i=0;i{
printf("");
for(l=n-2;l>i;l--)
printf(" ");
for(j=b;j<=n;j++)
printf("%d",j);
for(k=n-1;k>=b;k--)
printf("%d",k);
b--;
}
getch();
}

Related Links :

Factorial Function In C

#include "stdio.h"
#include "conio.h"
long int factorial(int n);
void main()
{
int n,i;
float s,r;
char c;
clrscr();
repeat : printf("You have this series:- 1/1! + 2/2! + 3/3! + 4/4!");
printf("To which term you want its sum? ");
scanf("%d",&n);
s=0;
for (i=1;i<=n;i++)
{
s=s+((float)i/(float)factorial(i));
}
printf("The sum of %d terms is %f",n,s);
fflush(stdin);
printf ("Do you want to continue?(y/n):- ");
scanf("%c",&c);
if (c=='y')
goto repeat;
getch();
}

long int factorial(int n)
{
if (n<=1)
return(1);
else
n=n*factorial(n-1);
return(n);
}

Related Links :

ARRANGE THE ELEMENTS IN ARRAY IN DESSENDING ORDER

main()
{
int a[100],i,n,j,search,temp;
printf("\n how many no's in array");
scanf("%d",&n);
printf("\n enter %d elements in array",n);
for(i=0;iscanf("%d",&a[i]);
for(i=0;i{
for(j=i+1;j{
if(a[i]{
temp=a[i];
a[i]=a[j];
a[j]=temp;
}
}
printf("%4d",a[i]);
}
getch();
}

Related Links :

SEARCHING OF THE ELEMENTS OF BINARY NOUMBER

main()
{
int a[100],i,n,j,search,mid,temp;
printf("\n how many no's in array");
scanf("%d",&n);
printf("\n enter %d elements in array",n);
for(i=0;iscanf("%d",&a[i]);
for(i=0;i{
for(j=i+1;j{
if(a[i]>a[j])
{
temp=a[i];
a[i]=a[j];
a[j]=temp;
}
}
printf("%4d",a[i]);
}
printf("\n enter search element");
scanf("%d",&search);
mid=n/2;
if(a[mid]==search)
{
printf("\n location of searched element %d ",mid);
}
if(search>a[mid])
{
for(i=mid+1;i{
if(a[i]==search)
{
printf("\n location of sarched element is %d",i);
}
else
for(i=0;i{
if(a[i]==search)
printf("\n location of searched element %d",i+1);
}xc
getch();
}
}
}

Related Links :

PROGRAM TO ARRANGE THE ELEMENTS IN ARRAY IN ASSENDING ORDER

/*ARRANGE THE ELEMENTS IN ARRAY IN ASSENDING ORDER*/
#include "stdio.h"
#include "conio.h"
main()
{
int a[100],i,n,j,search,temp;
printf("\n how many no's in array");
scanf("%d",&n);
printf("\n enter %d elements in array",n);
for(i=0;iscanf("%d",&a[i]);
for(i=0;i{
for(j=i+1;j{
if(a[i]>a[j])
{
temp=a[i];
a[i]=a[j];
a[j]=temp;
}
}
printf("%4d",a[i]);
}
getch();
}

Related Links :

FIND THE SUM OF DIGIT THREE Numbers

/* FIND THE SUM OF DIGIT THREE NO'S*/
#include "math.h"
main()
{
int d,d1,d2,d3,r1,r2,sum;
clrscr();
printf("\n enter any three digit no's");
scanf("%d",&d);
d1=d/100;
r1=d%100;
if(r1!=0)
{
d2=r1/10;
r2=r1%10;
if(r2!=0)
d3=r2;
else
d3=0;
}
else
d2=0;
d3=0;
}
sum=d1+d2+d3;
printf("\n sum of 3 digit no is %d",sum);
getch();
}

Related Links :

#include "stdio.h"
#include "conio.h"
main()
{
int a[3][3],b[3][3],i,j;
clrscr();
printf("\n Enter the value of n = ");
for(i=0;i<3;++i)
{
for(j=0;j<3;++j)
scanf("%d",&a[i][j]);
}
printf("\n =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=");
printf("\n THE MATRIX OF A\n");
for(i=0;i<3;++i)
{
for(j=0;j<3;++j)
printf("%3d",a[i][j]);
printf("\n\n");
}
printf("\n THE TRANSPOSE OF MATRIX B\n");
for(i=0;i<3;++i)
{
for(j=0;j<3;++j)
{
b[i][j]=a[j][i];
printf("%3d",b[i][j]);
}
printf("\n =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=\n");
}
getch();
}


*****************************************************************

Output :

Enter the value of n = 1 2 3 4 5 6 7 8 9

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
THE MATRIX OF A
1 2 3

4 5 6

7 8 9


THE TRANSPOSE OF MATRIX B
1 4 7
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
2 5 8
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
3 6 9
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

Related Links :

Matrix Multiplication

void main()
{
int row1=0,
col1=1,
row2=0,
col2=0,
**matrix1,
**matrix2,
**result;

clrscr();
printf(" Enter number of row for first matrix ");
scanf("%d",&row1);

while (col1!=row2)
{
printf(" Enter number of column for first matrix ");
scanf("%d",&col1);

printf(" Enter number of row for second matrix ");
scanf("%d",&row2);

if (col1!=row2)
{
clrscr();
printf("Column number of first matrix must be same as the row number of second matrix");
}


}


printf(" Enter number of column for second matrix ");
scanf("%d",&col2);

matrix1=init(matrix1,row1,col1);
matrix2=init(matrix2,row2,col2);
/* setting values in matrix */
printf("First matrix \n");
set(matrix1,row1,col1);
printf("Second matrix \n");
set(matrix2,row2,col2);
/* printint matrix */
clrscr();
printf(" [ First matrix ]\n");
get(matrix1,row1,col1);
printf(" [ Second matrix ]\n");
get(matrix2,row2,col2);

printf(" [ Multiplication Result ]\n");
result=mul(matrix1,matrix2,row1,col2,col1);
get(result,row1,col2);
printf("\n\t\t Thanks from debmalya jash");
getch();
free(matrix1);
free(matrix2);
fress(result);


} /* end main */


/* to initialize matrix */
int** init(int** arr,int row,int col)
{
int i=0,
j=0;

arr=(int**)malloc(sizeof(int)*row*col);

for(i=0;i {
for(j=0;j {
*((arr+i)+j)=(int*)malloc(sizeof(int));
*(*(arr+i)+j)=0;
}
}
return arr;
}

/* to set value in matrix */
int** set(int** arr,int row,int col)
{
int i=0,
j=0,
val=0;

for(i=0;i {
for(j=0;j {
printf("Enter value for row %d col %d :",(i+1),(j+1));
scanf("%d",&val);
*(*(arr+i)+j)=val;
}
}
return arr;
}


/* print values of the passed matrix */
void get(int** arr,int row,int col)
{
int i=0,
j=0;

for(i=0;i {
for(j=0;j {
printf("%d\t",*(*(arr+i)+j));
}
printf("\n");
}
}

/* mutiply two matrices and return the resultant matrix */
int** mul(int** arr1,int** arr2,int row,int col,int col1)
{
int **result,
i=0,
j=0,
k=0;

result=init(result,row,col);

for(i=0;i {
for(j=0;j {
for(k=0;k {
printf("%dX%d(%d)",*(*(arr1+i)+k),*(*(arr2+k)+j),(*(*(arr1+i)+k))*(*(*(arr2+k)+j)));
*(*(result+i)+j)+=(*(*(arr1+i)+k))*(*(*(arr2+k)+j));

if (k!=(col1-1))
printf("+");
}
printf("\t");
}
printf("\n");
}
return result;

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More Useful Topics...

 

History Of C..

In the beginning was Charles Babbage and his Analytical Engine, a machine
he built in 1822 that could be programmed to carry out different computations.
Move forward more than 100 years, where the U.S. government in
1942 used concepts from Babbage’s engine to create the ENIAC, the first
modern computer.
Meanwhile, over at the AT&T Bell Labs, in 1972 Dennis Ritchie was working
with two languages: B (for Bell) and BCPL (Basic Combined Programming
Language). Inspired by Pascal, Mr. Ritchie developed the C programming
language.

My 1st Program...


#include
#include
void main ()
{
clrscr ();
printf ("\n\n\n\n");
printf ("\t\t\t*******Pankaj *******\n");
printf ("\t\t\t********************************\n");
printf ("\t\t\t\"Life is Good...\"\n");
printf ("\t\t\t********************************");
getch ();
}

Next Step...


#include
#include

void main ()
{
clrscr ();
printf ("\n\n\n\n\n\n\n\n");
printf ("\t\t\t --------------------------- \n\n");

printf ("\t\t\t | IGCT, Info Computers, INDIA | \n\n");
printf ("\t\t\t --------------------------- ");

getch ();

}

Hits!!!