Renewed Structure

Algorithm/Recursion/P29_23_GCD.cpp

@@ -0,0 +1,20 @@
+#include <iostream>
+#include <cmath>
+using namespace std;
+
+int gcd(int x, int y){
+	x = abs(x);
+	y = abs(y);
+	if(y == 0)
+		return x;
+	if(y > 0)
+		return gcd(y, x % y);
+	return 0;
+}
+
+int main(){
+	cout << gcd(20 ,30) << endl;
+	cout << gcd(112, 42) << endl;
+	cout << gcd(-112,42) << endl;
+	return 0;
+}