Dec2Bin.c

// Van-Duyet Le <[email protected]>
// Home: http://lvduit.com

#include <stdio.h>

long dec2bin(int n) {
	long result = 0;

	for (int c = 31; c >= 0; c--) {
		int k = n >> c;

		if (k & 1)
			result = result * 10 + 1;
		else
			result *= 10;
	}

	return result;
}


 // Test it
int main() {
	printf("%ld\n", dec2bin(3));

	return 0;
}