C program for addition of binary numbers

source code

#include<stdio.h>

int main()

{

  long int binary1,binary2;   

  int i=0,remainder = 0,sum[20];

 printf("Enter any first binary number: ");

 scanf("%ld",&binary1);

 printf("Enter any second binary number: ");

 scanf("%ld",&binary2);

 while(binary1!=0||binary2!=0)

{

  sum[i++] =  (binary1 %10 + binary2 %10 + remainder ) % 2;

   remainder = (binary1 %10 + binary2 %10 + remainder ) / 2;

   binary1 = binary1/10;

   binary2 = binary2/10;

    }

  if(remainder!=0)

         sum[i++] = remainder;

--i;

    printf("Sum of two binary numbers: ");

    while(i>=0)

         printf("%d",sum[i--]);

    getch();

   return 0;

}