C Program to allocate Run time Memory For variable in C

C Program to allocate Run time Memory For variable in C

#include 
#include 
main()
{
int  *base;  \\ A
int i;  
int cnt=0;
int sum=0;
printf("how many integers you have to store \n"); 
scanf("%d",&cnt);  
base = (int *)malloc(cnt * sizeof(int)); 
printf("the base of allocation is %16lu \n",base); 
if(!base) 
  printf("unable to allocate size \n");
else
 {  
 for(int j=0;j<=cnt;j++)  
 *(base+j)=5;
 }
 sum = 0;
 for(int j=0;j<=cnt;j++)  
 sum = sum + *(base+j);
 printf("total sum is %d\n",sum);
 free(base);  
 printf("the base of allocation is %16lu \n",base);
 base = (int *)malloc(cnt * sizeof(int));
printf("the base of allocation is %16lu \n",base);
 base = (int *)malloc(cnt * sizeof(int)); 
printf("the base of allocation is %16lu \n",base);
 base = (int *)calloc(10,2);   
printf("the base of allocation is %16lu \n",base);


}

Related Links :

Manually Memory Allocation By using MALLOC in C

Manually Memory Allocation By using MALLOC in C

#include 
#include 
main()
{
int  *base; 
int i;  
int cnt=0;
int sum=0;
printf("how many integers you have to store \n"); 
scanf("%d",&cnt); 
base = (int *)malloc(cnt * sizeof(int));
printf("the base of allocation is %16lu \n",base);
if(!base)
  printf("unable to allocate size \n");
else
 {  
 for(int j=0;j<=cnt;j++) 
 *(base+j)=5;
 }
 sum = 0;
 for(int j=0;j<=cnt;j++)  
 sum = sum + *(base+j);
 printf("total sum is %d\n",sum);
 free(base); 
 printf("the base of allocation is %16lu \n",base);
 base = (int *)malloc(cnt * sizeof(int));
printf("the base of allocation is %16lu \n",base);
 base = (int *)malloc(cnt * sizeof(int)); 
printf("the base of allocation is %16lu \n",base);
 base = (int *)calloc(10,2);   
printf("the base of allocation is %16lu \n",base);


}

Related Links :

Recursive Function in C for addition of given two numbers

Recursive Function in C for addition of given two numbers

#include 
int add(int pk,int pm);
main()
{
 int k ,i,m;
 m=2;
 k=3;
 i=add(k,m);
 printf("The value of addition is %d\n",i);
 getch();
}


int add(int pk,int pm)  
{
if(pm==0) return(pk); 
else return(1+add(pk,pm-1));
}

Related Links :

C Program to calculate length of given string in C without using STRLEN function

C Program to calculate length of given string in C without using STRLEN function

main ( )
{
 char s1[6] = “abcde ”;
 int cnt = 0;
 cnt = cnt_str(s1);
       printf( “ total characters are %d \n”, cnt);
}

int cnt_str(char s1[]);
{
 int cn = 0;
           while ( (cn < 6) && s1[cn]! = ‘\0’)  cn++;  return(cn); }     

Related Links :

interchanging the values of string in C

main ( )
{
 char * s1 = “abcd”;
 char  s2[] = “efgh”; 
printf( “%s %16lu \n, s1, s1); 
printf( “%s %16lu \n, s2, s2);  
 s1 = s2; 
printf( “%s %16lu \n, s1, s1);   
printf( “%s %16lu \n, s2, s2);  
}

Related Links :

Program to explain Working of Union in C

Program to explain Working of Union in C

union marks  \\ A
    {
 float perc; \\ B
 char grade; \\ C
    }
main ( )
   {
 union marks student1; \\ E
 student1.perc = 98.5; \\ F
 printf( “Marks are %f   address is  %16lu\n”, student1.perc, &student1.perc);  \\ G 
 student1.grade = ‘A’’; \\ H 
 printf( “Grade is  %c  address is  %16lu\n”, student1.grade, &student1.grade); \\ I
   }

Related Links :

C Program to Sort the numbers and store them in file using user define function

C Program to Sort the numbers and store them in file using user define function

C Program to Sort the numbers and store them in file using user define function

#include

int bubble(int*,int);
void filewrite();
void avgmarks();
void fileprint();
void filesort();
void rollin();

/*********************** SORTING FUNCTION ***************************/
int bubble(int x[],int n)
{
int hold,j,pass,i,switched = 1;
for(pass = 0; pass < n-1 && switched == 1;pass++)  {   switched=0;   for (j=0;jx[j+1])
  {
   switched=1;
   hold = x[j];
   x[j] = x[j+1];
   x[j+1]=hold;
   }
  }
return(0);
}
/*********************** FILE WRITING FUNCTION ******************************/

void filewrite()
{
 int roll,ch,mark;
 char nam[50];
  FILE *fp;
  clrscr();
 fp = fopen("student.txt","a");
  printf("ENTER ROLL NUMBER, NAME , MARKS \n");
 ch =1;
 while(ch)
 {
 scanf("%d%s%d",&roll,&nam,&mark);
 fprintf(fp,"%d %s %d\n",roll,nam,mark);
 printf("\n\n press 1 to continue,0 to stop");
 scanf("%d",&ch);
 }
  fclose(fp) ;
}
/******************** OUTPUTING DATA ON SCREEN***************/
void fileprint()
{
 int marks[100],rollno[100],x[100],i;
 char name[100][50];
 FILE *fp;

 clrscr();
 fp = fopen("student.txt","r");
  i=0;
  printf("ROLLNO       NAME        MARK\n");
  while(!feof(fp))
 {
    fscanf(fp,"%d %s %d\n",&rollno[i],&name[i],&marks[i]);
    printf(" %d          %s          %d\n",rollno[i],name[i],marks[i]);
    i=i+1;
  }
  fclose(fp);
  printf("\n\n\nPRESS ANY KEY");
  getch();

 }
/******************* SORTING FILE ************************/
 void filesort()
 { int marks[100],rollno[100],x[100],n,i,j;
   char name[100][50];
   FILE *fp,*fm;

   fp = fopen("student.txt","r");
   fm = fopen("marks.txt","w");
   i=0;
  while(! feof(fp))
   {

    fscanf(fp,"%d %s %d\n",&rollno[i],&name[i],&marks[i]);
    x[i]= marks[i];
    i=i+1;
     }

      n=i;

      bubble(x,n);

 for(i=0;i

Related Links :

How to make computer beep through C

#include 
int main(void)
{
    printf("\a");
    return 0;
}

PROGRAM 2 :

#include             /*  beep1.c  */
#include 
#include 

int main(void)
{
    int i, j, speed = 2000;

    printf("1 \a \n");      /* works with just stdio.h */
     Sleep(1000);            /* need windows.h */
                      /* must wait before dings or I won't get ding
                         I guess 'cause it's working so hard to make it: ) */

    printf("2  \n");
    putchar(0x07);          /* works with just stdio.h */
    Sleep(1000);

    printf("3  \n");
    Beep(2750, speed);      /* need windows.h */
    Sleep(1000); 
    
    printf("4  \n");
    _beep(2750, speed);     /* need stdlib.h */
    _sleep(1000);           /* need stdlib.h */


    /* I get the same Beep for all of these */

    for(i = 400; i <= 2000; i += 400 ) {
      for(j = 400; j <= 2000; j += 400) {
        printf("Beep(%d, %d)  \n", i, j);
        Beep(i, j);
        /* Beep(200, speed); */
        Sleep(1000);
      }
    }
    return 0;
}
/*
Here's where they come from in my mingw - includes directory:
-----
winbase.h
BOOL WINAPI Beep(DWORD,DWORD);
-----
stdlib.h
/ *
 * NOTE: Officially the three following functions are obsolete. The Win32 API
 *       functions SetErrorMode, Beep and Sleep are their replacements.
 * /
_CRTIMP void __cdecl _beep (unsigned int, unsigned int);
_CRTIMP void __cdecl _seterrormode (int);
_CRTIMP void __cdecl _sleep (unsigned long);

Related Links :

Program to print letter S by using loops in C

Program to print letter S by using loops in C

#include
#include
void main()
{
int a[15][3],i,j;
clrscr();
for (i=0;i<3;i++)
{
for(j=0;j<16;j++)
{
printf("%d",a[i][j]=0);
}
printf("\n");
}
for(i=0;i<3;i++)
{
for(j=0;j<4;j++)
{
printf("%d",a[i][j]=0);
}
printf("\n");
}
for(i=0;i<3;i++)
{
for(j=0;j<16;j++)
{
printf("%d",a[i][j]=0);
}
printf("\n");
}
printf("            ");
for(i=0;i<3;i++)
{
for(j=15;j>11;j--)
{
printf("%d",a[i][j]=0);
}
printf("\n");
printf("            ");
}
printf("\r");
for(i=0;i<3;i++)
{
for(j=0;j<16;j++)
{
printf("%d",a[i][j]=0);
}
printf("\n");
}
}






OUTPUT :

****************
**------------**
******--------**
****
****
****
****--------****
-----------*****
-----------*****
            ****
            ****
            ****
****--------****
***----------***
**-----------***

Program 2 :

#include
#include
void main()
{
int a[15][3],i,j;
clrscr();
for (i=0;i<3;i++)
{
for(j=0;j<16;j++)
{
printf("%d",a[i][j]=0);
}
printf("\n");
}
for(i=0;i<3;i++)
{
for(j=0;j<4;j++)
{
printf("%d",a[i][j]=0);
}
printf("\n");
}
for(i=0;i<3;i++)
{
for(j=0;j<16;j++)
{
printf("%d",a[i][j]=0);
}
printf("\n");
}
printf(" ");
for(i=0;i<3;i++)
{
for(j=15;j>11;j--)
{
printf("%d",a[i][j]=0);
}
printf("\n");
printf(" ");
}
printf("\r");
for(i=0;i<3;i++)
{
for(j=0;j<16;j++)
{
printf("%d",a[i][j]=0);
}
printf("\n");
}

Related Links :

Program to sort country names in C

Program to sort country names in C

#include 
#include 

#define countryNo 5
#define maxLength 100

void sortNames(char country[countryNo][maxLength])
{
 char temp[maxLength];
 int i, j;

 // bubble sort
 for (j = 0; j < countryNo - 1; j++)
 {
  for (i = 0; i < countryNo - 1; i++)
  {
   if (strcmp(country[i], country[i + 1]) > 0)
   {
    strcpy(temp, country[i]);
    strcpy(country[i], country[i + 1]);
    strcpy(country[i + 1], temp);
   }
  }
 }
}


int main(int argc, char **argv)
{
 char country[countryNo][maxLength];
 int i;

 // enter names
 for (i = 0; i < countryNo; i++)
 {
  printf("Enter name of country #%d: ", i + 1);
  gets(country[i]);
 }

 sortNames(country);

 // display
 for (i = 0; i < countryNo; i++)
 {
  printf("%s\n", country[i]);
 }

 return 0;
}

Related Links :

C Program showing to shC Program showing example of short hand operator

C Program showing example of short hand operator

#include

main( )
{
  int a,b,c,d;
  printf("ENTER VALUES OF a,b, c, d");
  scanf("%d%d%d",&a,&b,&c);
   a  += b*c+d;
  printf("\n a = %d",a);
  }

Related Links :

Concept of SCOPE OF VARIABLES in C

Concept of SCOPE OF VARIABLES in C

#include 
main()
{    
   int i = 10; 

   {      
       int i = 0;       
       for( i=0;i<2;i++)         
{               
printf("value of i is %d\n",i);        
}         
}    
printf("the value of i is %d\n",i);   }    

Explanation :

• The statement block 1 defines the start of block 1.
• The statement ‘end of block 1’ defines the end of block 1.
• Statement A defines variable i which has the scope in the entire block 1.
• The statement block 2 defines the start of block 2.
• The statement ‘end of block 2’ defines the end of block 2.
• Statement B defines variable i which is entirely in block 2.
• The for loop refers i, which can be resolved using two definitions: statement A and statement B.
• Since the definition of statement B is nearest, the variable is referred using that definition, so the for loop modifies the value of i at statement B.
• Variable i at statement A and variable i at statement B are two independent variables even though they have the same name. Statement D is outside block 2, so it prints the value of variable i in block 1.

Related Links :

Working of REGISTER VARIABLES in C

Working of REGISTER VARIABLES in C

#include 
main()
{
   register int i = 0;

   for( i=0;i<2;i++)     {         printf("value of i is %d\n",i);     } }  

Explanation :

• Here the register allocation directive is given for variable i. During execution, i will be allocated a register if it is available; otherwise, i will receive normal memory allocations.
• You can use a register directive only for variables of the automatic storage class, not for global variables.
• Generally, you can use register storage for int or char data types.

Related Links :

Program to explain Concept of Storage of EXTERNAL REFERENCES of variable in C

Program to explain Concept of Storage of EXTERNAL REFERENCES of variable in C

#include                  
#include 
extern int i;       
main()
{
    i =0;                          
    printf("value of i %d\n",i);
}

\\ Program in file f1.cpp

int i =7;               

Related Links :

Program to explain Concept of Storage of Variables in memory in c

Program to explain Concept of Storage of Variables in memory in c

#include 
int g = 10;   \\ A
main()
{
    int i =0;  \\ B
    void f1(); \\ C
    f1();             \\ D
    printf(" after first call \n");
    f1();             \\ E
    printf("after second call \n");
    f1();             \\ F
    printf("after third call \n");

}
void f1()
{
    static int k=0;   \\ G
    int j = 10;              \\ H
    printf("value of k %d j %d",k,j);
    k=k+10;
}

Related Links :

C Program to sort the name by length

#include 
#include 

int main()
{
char name1[12], name2[12], mixed[25];
char title[20];

   strcpy(name1, "Rosalinda");
   strcpy(name2, "Zeke");
   strcpy(title, "This is the title.");

   printf("     %s\n\n", title);
   printf("Name 1 is %s\n", name1);
   printf("Name 2 is %s\n", name2);

   if(strcmp(name1, name2) > 0)  /* returns 1 if name1 > name2 */
      strcpy(mixed, name1);
   else
      strcpy(mixed, name2);

   printf("The biggest name alphabetically is %s\n", mixed);

   strcpy(mixed, name1);
   strcat(mixed, "  ");
   strcat(mixed, name2);
   printf("Both names are %s\n", mixed);

   return 0;
}



/* Result of execution

     This is the title.

Name1 is Rosalinda
Name2 is Zeke
The biggest name alphabetically is Zeke
Both names are Rosalinda  Zeke

*/

Related Links :

C Program to be terminated by pressing X key

C Program to be terminated by pressing X key

#include "stdio.h"
#include "conio.h"

int main()
{
int c;

   printf("Enter any characters, terminate program with X\n");

   do 
   {
      c = _getch();                    /* get a character */
      putchar(c);                  /* display the hit key */
   } while (c != 'X');

   printf("\nEnd of program.\n");

   return 0;
}



/* Result of execution

Enter any characters, terminate program with X

(The output depends on the characters you type in.)

End of program.

*/

Related Links :

C Program to swap memory address by using pointers

main()
{
 int a, b, *p1, *p2, x, y, z;
 clrscr();
 a=10;
 b= 5;
 p1=&a;
 p2=&b;
 x= *p1 * *p2 -6;
 y= 4 * - *p1 / *p2 + 10;
 printf("Address of a: %u\n",p1);
 printf("Address of b: %u\n",p2);
 printf("\na: %d, b: %d\n",a,b);
 printf("X: %d, y: %d\n",x,y);
 *p2=*p2+3;
 *p1=*p2-5;
 z= *p1 * *p2-6;
 printf("\na: %d, b: %d",a,b);
 printf("\nz: %d", z);
 getch();
}

Related Links :

C Program to sort the marks of students in pre defined array

C Program to sort the marks of students in pre defined array

#include
void sort(int m, int x[]);
main()
{
 int i;
int marks[5]={40, 90, 73, 81, 35};
clrscr();
printf("Marks before sorting\n");
for(i=0; i<5; i++)
 printf("%4d", marks[i]);
printf("\n\n");
sort(5,marks);
printf("Marks after sorting\n");
for(i=0; i<5; i++)
 printf("%4d", marks[i]);
printf("\n");
getch();
}
void sort(int m, int x[])
{
 int i, j, temp;
for(i=1; i<=m-1; i++)
 {
  for(j=1;j<=m-1;j++)
  {
   if(x[j-1]>=x[j]
   {
    temp=x[j-1];
    x[j-1]=x[j];
    x[j]=temp;
   }
  }
 }
}

Related Links :

Removing spaces and punctuation from a string in C Language

Removing spaces and punctuation from a string in C Language

#include 
#include 

#define BUFFER_LEN 500             /* Length of input buffer     */

int main(void)
{
   char buffer[BUFFER_LEN];        /* Input buffer                */
   char *pbuffer1 = buffer;        /* Pointer to buffer position  */
   char *pbuffer2 = buffer;        /* Pointer to buffer position  */

   /* Read a string */
   printf("Enter a string of up to %d characters:\n", BUFFER_LEN);
   while((*pbuffer1++ = getchar()) != '\n')
     ;
   *pbuffer1 = '\0';               /* Append string terminator         */
   pbuffer1 = buffer;              /* Reset pointer to start           */
   while(*pbuffer1 != '\0')        /* Loop until the end of the string */
   {
     if(ispunct(*pbuffer1) || isspace(*pbuffer1))
     {                             /* If it's space or puctuation   */
       ++pbuffer1;                 /* go to the next character      */
       continue;
     }
     else
       *pbuffer2++ = *pbuffer1++;  /* otherwise, copy the character */
   }
   *pbuffer2 = '\0';               /* Append string terminator      */
   printf("\nWith the spaces and punctuation removed, the string is now:\n%s\n", buffer);
  return 0;
}

Related Links :

C Program to Calculating a floating-point average using pointers

C Program to Calculating a floating-point average using pointers

#include 
#include 
#include 

int main(void)
{
  double *values = NULL;     /* Pointer to memory holding data values       */
  double *temp = NULL;       /* Pointer to newly allocated memory           */
  double sum = 0.0;          /* Sum of values                               */
  int capacity = 0;          /* Maximum number of values that can be stored */
  int increment = 5;         /* Capacity increment for dynamic allocation   */
  int count = 0;             /* Number of values read                       */
  char answer = 'n';

  do
  {
    if(count == capacity)    /* Check if there is spare memory */
    {
      capacity += increment; /* Increase the capacity of memory by increment */
      temp = (double*)malloc((capacity)*sizeof(double)); /* and allocate it  */
      if(!temp)              /* If memory was not allocated */
      {                      /* Output a message  and end   */
        printf("Memory allocation failed. Terminating program.");
        exit(1);
      }
      if(!values)            /* Are there any values?                  */
        values = temp;       /* No - so just copy address of new memory */
      else                   /* Yes - so copy data from old to new      */
      {
        for(int i = 0 ; i<=count ; i++)
          *(temp + i) = *(values + i);
        free(values);        /* Free the old memory */
        values = temp;       /* Copy address of new */
      }
      temp = NULL;           /* Reset pointer       */
    }

    printf("Enter a value: ");
    scanf("%lf", values+count++);

    printf("Do you want to enter another(y or n)? ");
    scanf(" %c", &answer);
  }while(tolower(answer) == 'y');

  /* Now sum the values */
  for(int i = 0 ; i<=count ; i++)
    sum += *(values+i);

  /* Output the average */
  printf("\n The average of the the values you entered is %.2lf.\n", sum/count);
  free(values);     /* We are done - so free the memory */
  return 0;
}

Related Links :

c program to check Looking for palindromes

c program to check Looking for palindromes

#include 
#include 
#include 
int main(void)
{
  char sentence[500];             /* Stores the sentence to be tested                   */
  char sentence_chars[500];       /* Stores the sentence without punctuation and spaces */
  size_t j = 0;                   /* Index to character position */
  size_t length = 0;              /* Length of a string          */

  printf("Enter a sentence to be tested:\n");
  gets(sentence);
  /* Copy only letters as lowercase */
  for (size_t i = 0 ; i< strlen(sentence) ; i++)
    if(isalpha(sentence[i]))
      sentence_chars[j++] = tolower(sentence[i]);
  sentence_chars[j] = '\0';        /* Append string terminator */

  length = strlen(sentence_chars); /* Get the satring length   */

  /* Compare matching characters in the string                */
  /* If any pair are not the same, then it's not a palindrome */
  for(size_t i = 0 ; i<=length/2 ; i++)
    if(sentence_chars[i] != sentence_chars[length-1-i])
    {
      printf("\n The sentence you entered is not a palindrome.\n");
      return 0;
    }
    /* If we arrive here all matching pairs of characters are equal */
    printf("\n The sentence you entered is a palindrome.\n");
    return 0;
}

Related Links :

c program to generate A random thought for the day

c program to generate A random thought for the day

#include 
#include 
#include 

int main(void)
{
  char thoughts[][50] = {"Wherever you go, there you are!",
                         "A nod is as good as a wink to a blind horse.",
                         "Many hands make light work.",
                         "Too many cooks spoil the broth.",
                         "A rolling stone gathers no moss.",
                         "A wise man will cover the hole in his carpet."};

  srand((unsigned int)time(NULL));

  printf("Today's thought is:\n%s\n", thoughts[rand()%(sizeof thoughts/sizeof thoughts[0])]);
  return 0;
}

Related Links :

c program to Analyze comma-separated list of words

c program to Analyze comma-separated list of words

#include 
#include 

int main(void)
{
 char list[5000];       
 char words[500][20];   
 const char comma = ',';
 const char space = ' ';
 int word_count = 0;    
 int word_length = 0;   
 int index = 0;         

 printf("Enter a comma separated list of words:\n");
 gets(list);            

while(list[index] != '\0')
 {
   /* Skip over spaces and commas */
   while(list[index] == space || list[index] == comma)
     ++index;

   /* Copy characters that are not space, comma or \0 as part of a word */
   while(list[index] != space && list[index] != comma && list[index] != '\0')
    words[word_count][word_length++] = list[index++];

   words[word_count++][word_length] = '\0';
   word_length = 0;                        
 }

 /* List the words that were found */
 printf("\nThe words in the list are:\n");
 for(index = 0 ; index

Related Links :

C Program to Convert an integer to words

C Program to Convert an integer to words

#include 
#include 

int main(void)
{
 char *unit_words[] = {"zero", "one","two","three","four","five","six","seven","eight","nine"};
 char *teen_words[] = {"ten", "eleven","twelve","thirteen","fourteen","fifteen","sixteen","seventeen","eighteen","nineteen"};
 char *ten_words[] = {"error", "error","twenty","thirty","forty","fifty","sixty","seventy","eighty","ninety"};
 char hundred[] = " hundred";
 char and[] = " and ";
 char value_str[50] = "";
 int value = 0;                     /* Integer to be converted        */
 int digits[] = {0,0,0};            /* Stores digits of value entered */
 int i = 0;

 printf("Enter a positive integer less than 1000: ");
 scanf("%d",&value);
 if(value >= 1000)
   value = 999;
 else if(value < 1)     value = 1;    while(value > 0)
 {
   digits[i++] = value%10;
   value /= 10;
 }

 if(digits[2] > 0)
 {
   strcat(strcat(value_str,unit_words[digits[2]]), hundred);
   if(digits[1]>0 || digits[0]>0)
     strcat(value_str, and);
 }
 if(digits[1] > 0)
 {
   if(digits[1] == 1)
     strcat(value_str,teen_words[digits[0]]);
   else
   {
     strcat(value_str,ten_words[digits[1]]);
     if(digits[0] > 0)
       strcat(strcat(value_str, " "), unit_words[digits[0]]);
   }
 }
 else
   if(digits[0] > 0)
     strcat(value_str, unit_words[digits[0]]);
 printf("\n%s\n", value_str);
 return 0;
}

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C Program to derive Table of reciprocals, squares, cubes, and fourth powers

C Program to derive Table of reciprocals, squares, cubes, and fourth powers

#include 

int main(void)
{
  double data[11][5];
  double value = 2.0;
  int row = 0;
  int col = 0;  

  for(int row = 0 ; row<11 ; row++)
 {
    data[row][0] = value;
  value += 0.1;
  }

  for(int row = 0 ; row<11 ; row++)
  {
    data[row][1] = 1.0/data[row][0];               /* 1/x     */
    data[row][2] = data[row][0]*data[row][0];      /* x*x     */
    data[row][3] = data[row][2]*data[row][0];      /* x*x*x   */
    data[row][4] = data[row][3]*data[row][0];      /* x*x*x*x */
  }


  printf("\n           x   ");
  printf("          1/x  ");
  printf("          x*x  ");
  printf("         x*x*x ");
  printf("        x*x*x*x");

    for(int row = 0 ; row<11 ; row++)
  {
    printf("\n");
    for(col = 0 ; col<5 ; col++)
      printf("%15.4lf", data[row][col]);
  }

  printf("\n");
 return 0;
}

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C Program to Summing reciprocals of given five values

#include 

int main(void)
{
  const int nValues = 5;         /* Number of data values     */
  double data[nValues];         /* Stores data values        */
  double reciprocals[nValues];
  double sum = 0.0;            /* Stores sum of reciprocals */

  printf("Enter five values separated by spaces:\n");
  for(int i = 0 ; i<=nValues ; i++)
    scanf("%lf", &data[i]);

  printf("\nYou entered the values:\n");
  for(int i = 0 ; i<=nValues ; i++)
    printf("%10.2lf", data[i]);
  printf("\n");

  for(int i = 0 ; i<=nValues ; i++)
    reciprocals[i] = 1.0/data[i];

  for(int i = 0 ; i<=nValues ; i++)
  {
    sum += reciprocals[i]; 
    if(i>0)
      printf(" + ");
    printf("1/%.2lf", data[i]);
  }
  printf(" = %lf\n", sum);
  return 0;
}

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C Program to Generate a multiplication table using IF and for loops

#include 

int main(void)
{
  int width = 0; 
  int height = 0;

  printf("Enter the box width and height size separated by a space: ");
  scanf("%d", &width);
  scanf("%d", &height);

  for(int row = 0 ; row<=height ; row++)
  {
    printf("\n");
    for(int col = 0 ; col<=width ; col++)
    {
      if(row == 0||row==height-1)
      {
          printf("*");           
          continue;
      }
      /* An * in 1st & last column, otherwise a space */
      printf("%c", ((col==0 || col==width-1) ? '*' :' '));
    }
  }
  printf("\n");
 return 0;
}

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C Program to Displaying printable characters plus whitspace names

#include 
#include 

int main(void)
{
  char ch = 0;                       /* Character code value */
  for(int i = 0 ; i<128 ; i++)
  {
    ch = (char)i;
    if(ch%2==0)
      printf("\n");
    printf("  %4d",ch);
    if(isgraph(ch))
      printf("               %c",ch);
    else
      switch(ch)
    {
        case '\n':
           printf("         newline",ch);
           break;
        case ' ':
           printf("           space",ch);
           break;
        case '\t':
           printf("  horizontal tab",ch);
           break;
        case '\v':
           printf("    vertical tab",ch);
           break;
         case '\f':
           printf("       form feed",ch);
           break;
        default:
           printf("                ");
           break;

    }

  }
  printf("\n");
 return 0;
}

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