W3School TIY Editor

#include <iostream> #include <cmath> using namespace std; int main() { cout << atan2(0.5, 0.5) << "\n"; cout << atan2(-0.5, -0.5) << "\n"; cout << atan2(5, 5) << "\n"; cout << atan2(10, 20) << "\n"; cout << atan2(5, -5) << "\n"; cout << atan2(-10, 10) << "\n"; return 0; }