Use function as for loop control variable


#include <stdio.h>

int sqrnum(int num);
int readnum(void);
int prompt(void);

int main(void)
{
  int t;

  for(prompt(); t=readnum(); prompt())
    sqrnum(t);

  return 0;
} 

int prompt(void) 
{
  printf("Enter a number: ");
  return 0;
} 

int readnum(void)
{
  int t;

  scanf("%d", &t);
  return t;
}

int sqrnum(int num)
{
  printf("%d\n", num*num);
  return num*num;
}

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Use function as for loop control variable : For « Language Basics « C / ANSI-C

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