Sushil's Blog on Programming Tutorials

Source Code:
#include <stdio.h>
#include <conio.h>

void main()
{
int i, n, s;
   clrscr();
   s = 0;

  printf("\tProgram to Find Friendly Number.");
   printf("\n\t\t\tEnter numbers:");
   scanf("%d %d", &n);

   for(i = 1; i <= n; i++)  //loop to find divisor
   {
    if(n1 % i == 0)  // condition for divisor
      s += i; //adding divisor
   }

   // check for condition of friendly number
   if(s % n == 0)
    printf("\n\t\t%d is a Friendly Number", n1);
   else
    printf("\n\t\t%d is not a Friendly Number", n1);

   getch();
}