Question

How to use atan2() function to get the arc tangent value of y/x in C++

Answer 1

#include <iostream>
#include <cmath>

using namespace std;

int main()
{
	cout << "atan2(1, 1) = " << atan2(1, 1) << endl;
	cout << "atan2(1, -1) = " << atan2(1, -1) << endl;
	cout << "atan2(-1, 1) = " << atan2(-1, 1) << endl;
	cout << "atan2(-1, -1) = " << atan2(-1, -1) << endl;;

	return 0;
}


/*
run:

atan2(1, 1) = 0.785398
atan2(1, -1) = 2.35619
atan2(-1, 1) = -0.785398
atan2(-1, -1) = -2.35619

*/

 

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