Question

How to convert an integer to binary using recursion in C

Answer 1

#include <stdio.h> 
 
int recursive_int_to_binary(int n);
 
int main(void)
{   
    int n = 15;

    printf("%d", recursive_int_to_binary(n));
     
    return 0;
}

int recursive_int_to_binary(int n)
{
    if (n == 0)
        return 0;
    else
        return (n % 2) + 10 * recursive_int_to_binary(n / 2);
}

         
/*
run:
      
1111
 
*/

 

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