Function Passing No Arguments and Returning Values

This program describes how to write function passing no arguments and returning values.

#include <stdio.h>
#include <conio.h>

int sum (void);

void main()
{
  int c;
  c=sum();
  printf("n The sum of two numbers is : %d",c);
  getch();
}
int sum(void){
  int add, a, b;

  printf("Enter two numbers:");
  scanf("%d%d",&a,&b);

  add=a+b;

  return(add);
}

Output