atrctfun.cpp

#include <iostream>
#include <cmath>
using namespace std;

struct polar
{
	double distance;
	double angle;
};
struct rect
{
	double x;
	double y;
};
polar rect_to_polar(rect xypos);
void show_polar(polar dapos);
int main()
{
	polar pplace;
	rect rplace;
	cout << "Enter the x and y value: ";
	while (cin >> rplace.x >> rplace.y)
	{
		pplace = rect_to_polar(rplace);
		show_polar(pplace);
		cout << "Next two numbers (q to quit): ";
	}
	cout << "Done!" << endl;
	return 0;
}
polar rect_to_polar(rect xypos)
{
	polar answer;
	answer.distance = sqrt(xypos.x*xypos.x + xypos.y*xypos.y);
	answer.angle = atan2(xypos.y, xypos.x);
	return answer;
}
void show_polar(polar dapos)
{
	const double Rad_to_deg = 57.29577951;
	cout << "distance = " << dapos.distance;
	cout << ", angle = " << dapos.angle*Rad_to_deg;
	cout << " degrees" << endl;
}