C++ Strpose Function example.

#include 
#include 


int main()
{
 char string[80];              // Has 79 usable elements
 int pos, num_chars;

 cout << "Enter a string for the character array: ";
 cin.get(string,80,'\n');
 cout << "How many characters do you want to extract? ";
 cin >> num_chars;


 for (pos = 0; pos < num_chars; pos++)
 cout << string[pos];
 cout << '\n';

 return 0;
}

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C++ Program to Find Even Odd number

#include 

int main()
{
 int   your_number;
 cout << "Enter a whole number: ";
 cin >> your_number;

 if (your_number % 2 == 0)
     cout << "\nYour number is even\n";

 if (your_number % 2 != 0) 
        {
  cout << "Your number is odd.\n";
        }
cout << "That's all!\n";

return 0;
}

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C++ Program to Print ASCII Value of Given Char

#include 
#include 

int main()
{
 int one_char;
 cout << "\nEnter a character: ";
 one_char = getch();
 cout << "\nThe character you entered was "
             << (char) one_char << '\n';
 cout << " Its ASCII value is "<< (int) one_char << '\n';

 return 0;
}

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draw a interesting picture using line() in C++ Graphics

#include  
#include  
#include 

void main(void)
{
    int   driver = DETECT,mode;
    int   x[10],y[10];
    int   x_center = 360, y_center = 180, rad = 100;
    int   i,j;

    initgraph(&driver,&mode,"c:\\tc\\bgi");
    for ( i = 0; i < 10; i++ )
    {
       x[i] =  x_center + rad *  cos(36*i*3.14159/180);
       y[i] =  y_center + rad *  sin(36*i*3.14159/180);
    }
    for ( i = 0; i < 10; i++ )
       for ( j = 0; j < 10; j++ )
   line(x[i],y[i],x[j],y[j]);
    getch();           /* press any key return to TEXT mode */
    closegraph();
}

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C++ program to sort a range of numbers with Insertion and Quicksort, check their sorting time and prompt the result on the screen

#include 
#include 
#include 
#include 
#include 
#include 
#include 

/* define variable */
const int max=29000;
int list[max];
FILE *fp;
clock_t start,end;
char any1[8];

/* Insertion sort module */
void insertion(int min1,int max1)
{
    int a,b,v;

    for(a=min1;a<=max1;a++)
    {
       v = list[a];
       b = a;
       do
       {
    list[b] = list[b-1];
    b = b - 1;
       }  while(list[b-1] > v);
       list[b] = v;
    }
}

/* sort partitioning element */
void sorthree(int x,int y,int z)
{
int temp;

if (list[x] > list[y])
{
   temp = list[x];
   list[x] = list[y];
   list[y] = temp;
}
if (list[z] < list[x])
{
   temp = list[x];
   list[x] = list[z];
   list[z] = temp;
   temp = list[y];
   list[y] = list[z];
   list[z] = temp;
}
if ((list[z] > list[x]) && (list[z] < list[y]))
{
   temp = list[y];
   list[y] = list[z];
   list[z] = temp;
}
}

/* Quicksort module */
void quicksort(int min2,int max2)
{
int m,v,t,i,j,q;

if ((max2-min2) > 9)
{
   m = (max2-min2+1)/2;
   sorthree(min2,m,max2);
   max2=max2-1;
   q = list[m];
   list[m] = list[max2];
   list[max2] = q;

   v = list[max2];
   i = min2+1;
   j = max2-1;
   do
   {
      do
      {
  i=i+1;
      } while (list[i] < v);
      do
      {
  j=j-1;
      } while (list[j] > v);
      t = list[i];
      list[i] = list[j];
      list[j] = t;
   }  while (i<=j);
   list[j]=list[i];
   list[i]=list[max2];
   list[max2]=t;
   quicksort(min2,i-1);
   quicksort(i+1,max2);
 }
else
 insertion(m,max2);
}


/* main program */
void main()
{
int i,j,k,min,max1;
char any2[8];

clrscr();
cout << "Enter a file name to store data :";
cin >> any1;                                  /* input data file name on */
cout << '\n' << "Generating file...waits\n\n";/*   screen */

fp = fopen(any1,"w");
    for(j=0;j<=max/200;j++)
    {
       for(i=0;i<=200;i++)    /* write random values to file */
       {
    k = rand();
    fprintf(fp,"%d\n",k);
       }
    }
fclose(fp);

fp = fopen(any1,"r");
    i = 0;
    while(fscanf(fp,"%d\n",&k) != EOF)
    {
   list[i] = k;  /* read values from file and assign to an array */
   i = i + 1;
    }
fclose(fp);
min = 0;
max1 = max;
max1=max1-1;
cout << "Sorting with Quicksort... waits" << '\n';
start = clock();
quicksort(min,max1);   /* sort an unsorted list with quicksort */
end=clock();
float result = (end-start)/CLK_TCK;
cout << "The time needs to sort " << max
     << " numbers in Quciksort is : " << result << " second(s)" << "\n\n";


cout << "Enter an output file for Quicksort : ";
cin >> any2;

fp = fopen(any2,"w");
  for(i=0;i<=max;i++)
  {                   /* write the output from quicksort and put them */
      k = list[i];    /*to a file */
      fprintf(fp,"%d\n",k);
  }
fclose(fp);

fp = fopen(any1,"r");
    i = 0;
    while(fscanf(fp,"%d\n",&k) != EOF)
    {
   list[i] = k;
   i = i + 1;
    }
fclose(fp);
cout << "\nSorting with Insertion Sort... waits" << '\n';
start = clock();
insertion(0,max);   /* sort an unsorted list with insertion sort */
end=clock();
result = (end-start)/CLK_TCK;
cout << "The time needs to sort " << max
     << " numbers in Insertion is : " << result << " second(s)" << "\n\n";

cout << "Sort an already sorted array again with Quicksort..." << '\n';
min = 0;
max1 = max;
max1=max1-1;
start = clock();
quicksort(min,max1);  /* sort an already sort list with quicksort */
end=clock();
result = (end-start)/CLK_TCK;
cout << "The time needs to sort " << max
     << " numbers in Quicksort is : " << result << " second(s)" << "\n";

cout << "Sort an already sorted array again with Insertion sort..." << '\n';
start = clock();
insertion(0,max);   /* sort an already list with insertion sort */
end=clock();
result = (end-start)/CLK_TCK;
cout << "The time needs to sort " << max
     << " numbers in Insertion sort is : " << result << " second(s)" << '\n';
}

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C Program to create Random Numbers (CPP)

#include 
#include 
#include 
#include 

int main(void)
{
   int i,j;

      for(j=0;j<150;j++)
      {
     // randomize();
      for(i=0;i<200;i++)
  printf("%d\n", rand() % MAXINT);
      }
   return 0;
}

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C Program to find Given Character is vowel Or consonant by using switch case

C Program to find Given Character is vowel Or consonant

/* wap to determine whether the entered chracter is consonant or vowel*/
#include
main()
{
  char ch;
  clrscr();
  printf("\n Enter any character:");
  scanf("%c",&ch);
  switch(tolower(ch))
  {
   case 'a':
   case 'e':
   case 'i':
   case 'o':
   case 'u':
   printf("\n The character is vowel!");
   break;
   default :
   printf("\n The chracter is consonant!");
  }
   getch();
}

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C Assignment to calculate total percentage in c by using structures

C Assignment to calculate total percentage in c by using structures

#include
#include
struct student
{
char name[20];
int age;
int RollNo;
int marks[6];
int total;
float per;
};
 void setmarks(struct student *);
 void calculate(struct student *);
 void display(struct student *);
void main()
{

 struct student s1={"xyz",23,131},*ptr;
 clrscr();
 ptr=&s1;
 printf("\n Student Name=%s",ptr->name);
 printf("\n student Age=%d",ptr->age);
 printf("\n student roll number=%d",ptr->RollNo);
 setmarks(&s1);
 calculate(&s1);
 display(&s1);
getch();
}
void setmarks(struct student * m)
{
 int i;
 printf("\n Enter marks getting in 6 subjects.........\n");
 m->total=0;
  for(i=0;i<6;i++)     
{     
scanf("%d",&m->marks[i]);
   m->total=m->total+m->marks[i];
  }
}
void calculate(struct student *  p)
{
 p->per=p->total/600.0*100;
}
void display(struct student * d)
{
 printf("\n student Name=%s",d->name);
 printf("\n student age=%d",d->age);
 printf("\n student roll no=%d",d->RollNo);
 printf("\n student total markse=%d",d->total);
 printf("\n student percentage=%f",d->per);
 }

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Example Of stringlen Function in C

#include
#include
#include
void main()
{
 int len;
 char name[15]="www.lernc.blogspot.com";
 clrscr();
 len=strlen(name);
 printf("\n the length of name is %d",len);
 getch();
 }

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C Program to create a Star in C

main()
{
  int i,j,k;
  clrscr();
  for(i=1;i<=3;i++)
  {
   for(j=1;j<=3;j++)
   {
   for(k=1;k<=3;k++)
    {
    if(i==j||j==k||i==k)
    {
    continue;
    }
   else
    {
    printf("\n%d%d%d",i,j,k);
    }
    }
   }

  }



  getch();
}

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Selection Sorting of Given Array in c

Selection Sorting of Given Array in c

#include
#include
 void main()
 {
  int num[10],i,j,temp;
  clrscr();
  printf("\n Enter 10 values of an array...........\n");
  for(i=0;i<10;i++)
   scanf("%d",&num[i]);

 printf("\n array before sort .........\n");
  for(i=0;i<10;i++)
   printf("%d\t",num[i]);

 for(i=0;i<9;i++)
 {
  for(j=i+1;j<10;j++)
  {
   if(num[i]<=num[j])
   {
    temp=num[i];
    num[i]=num[j];
    num[j]=temp;
   }
  }
 }

 printf("\n array after sort .........\n");
  for(i=0;i<=10;i++)
   printf("%d\t",num[i]);

   getch();
  }

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C Program to print Address of Variable by using Pointers

C Program to print Address of Variable by using Pointers
Its very Basic Program for assignments of Collages.

#include
#include
void main()
{
 int a;
 float b;
 clrscr();
 printf("\n Address of a=%u",&a);
 printf("\n Address of b=%u",&b);
 getch();
}

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C Program to find Given Character id Vowel or Not

C Program to find Given Character id Vowel or Not

#include
#include
main()
{
 char ch;
 clrscr();
 printf("enter any character");
 scanf("%c",&ch);

 if(ch=='a'||ch=='e'||ch=='i'||ch=='o'||ch=='u')

 {
    printf("%c is an vowel",ch);
    }

    else

    {
       printf("%c is not a vowel ",ch);
    }

    getch();

  }

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Basic C Program to Print Matrix by using 2 D arrays

#include
#include
void main()
{
 int matrix1[2][3]={10,20,30,40,50,60},i,j;
 clrscr();
 for(i=0;i<2;i++)
 {
  for(j=0;j<3;j++)
   printf("%5d",matrix1[i][j]);
   printf("\n");
 }
 getch();
}

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C Program to find sum of given series by using Function

#include
#include
long int sum_sqr(int);
main()
{
 int n;
 clrscr();
 printf("\n Enter any number : ");
 scanf("%d",&n);
 printf("\n Sum of Series is %ld",sum_sqr(n));
 printf("\n\n Press any key to exit. . .");
 getch();
}

long int sum_sqr(int m)
{
 if(m<=1)    
return 1;   
else    
return 
(m*m+sum_sqr(m-1));   
}   

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Shell Sort Demo in C Programming

Shell Sort Demo in C Programming

#include 
#include 
#include 

void shell(char *items, int count)
{

 register int i, j, gap, k;
 char x, a[5];

 a[0]=9; a[1]=5; a[2]=3; a[3]=2; a[4]=1;

 for(k=0; k < 5; k++) 
{       
gap = a[k];       
for(i=gap; i < count; ++i) 
{         
x = items[i];         
for(j=i-gap; (x < items[j]) 
&& (j >= 0); j=j-gap)
       
items[j+gap] = items[j];

     items[j+gap] = x;
   }
 }
}

int main(void)
{

 char s[255];

 printf("Enter a string:");
 gets(s);
 shell(s, strlen(s));
 printf("The sorted string is: %s.\n", s);

 return 0;
}

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