Mengalikan angka tanpa mengalikan

KaliAja.cpp

/*
 * Perkalian tanpa perkalian :D
 * 
 * sid
 */

#include <iostream>


bool ganjilkah(int n) {
	return (n & 1);
}


int kali(int x, int y) {
	int z{0};

	while(x) {
		if(ganjilkah(x))
			z = z + y;
		x = x >> 1;
		y = y << 1;
	}

	return z;
}


int main(int argc, char** argv) {
	if(argc != 3)
		return -1;

	int x{std::stoi(argv[1])};
	int y{std::stoi(argv[2])};

	std::cout << "x = " << x << std::endl;
	std::cout << "y = " << y << std::endl;
	std::cout << "x * y = " << kali(x,y) << std::endl;

	return 0;
}