Declaration

X arg(const complex<X>& kqrZ);

Description

This is the friend function arg() for complex numbers. It returns the argument or angle in radians between the positive x-axis and the vector given by complex number kqrZ.

Header Include

#include <complex>

Example

#include <complex>
#include <iostream>

int main()
{
	using namespace std;

	// Create a complex number and calculate its argument
	complex<double> qZ(2.0, 4.0);
	cout << "Complex Number : "<< qZ << endl;
	cout << "The argument is "<< arg(qZ) << " radians." << endl;

	// Keep the window open
	cin.get();
	return 0;
}

Output