CS50x Coding Contest 2016 Practice - Decimal to Binary Conversion

decimaltobinary.c

#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "cs50.h"

int main(void)
{
    int i = 0;
    int remainder;
    int binary[50]; //this is an array placeholder for the binary digits. Once we put each one in there we will print it out again but backwards.

    int decimal = GetInt();
    
    while (decimal != 0)
    {
        binary[i] = decimal % 2;
        decimal = decimal / 2;
        i++;
    }
    
    for (int j = i - 1; j >= 0; j--)
        printf("%d", binary[j]);
}