C Program to Convert Decimal Number into Binary

// C program to convert decimal to binary 
#include <stdio.h>
#include <math.h>

long decimalToBinary(int decinum)
{
    long binum = 0;
    int rem, temp = 1;

    while (decinum!=0)
    {
        rem = decinum%2;
        decinum = decinum / 2;
        binum = binum + rem*temp;
        temp = temp * 10;
    }
    return binum;
}

int main()
{
    int decinum;
    printf("Enter a Decimal Number: ");
    scanf("%d", &decinum);
    printf(" Binary Number is: %ld", decimalToBinary(decinum));
    return 0;
}