Function Passing Arguments and Returning No Value

This C program describes how to write a code for function passing arguments and returning no value.

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

void sum (int, int);

void main()
{
  int a,b;
  printf("enter two numbers :");
  scanf("%d%d",&a,&b);
  sum(a,b);
  getch();
}
void sum(int s, int t){
  int add;

  add = s+t;

  printf("n The sum of the two numbers is : %d", add);

 }

Output