#include <stdio.h>
int addition(int num1, int num2)
{
     char sum;
         
      sum = num1+num2;

     /* Function return type is integer so we are returning
        an integer value, the sum of the num1 and num2. */
      
     return num1;
}

int main()
{
     int var1,var2,res;
     
     printf("Enter number 1: ");
     scanf("%d", var1);
     printf("Enter number 2: ");
     scanf("%d", var2);

     /* Calling the function here, the function return type
      * is integer so we need an integer variable to hold the
      * returned value of this function.
      */
     res = addition(var1, var2);  /*the returned sum value is place in
                                    res variable*/
                                  
     printf ("Output: %d", res);

     return 0;
}