C++ examples for Function:Function Return
Rectangular to Polar Coordinate Conversion
#include <iostream> #include <cmath> using namespace std; void getrec(double&, double&); // function prototype void polar(double, double, double&, double&); // function prototype void showit(double, double); // function prototype int main()/*from w ww. j a v a2 s .co m*/ { double x, y, distance, angle; getrec(x, y); polar(x, y, distance, angle); showit(distance, angle); return 0; } void getrec(double& x, double& y) { cout << "Rectangular to Polar Coordinate" << " Conversion Program\n" << endl; cout << "Enter the x coordinate: "; cin >> x; cout << "Enter the y coordinate: "; cin >> y; return; } void polar(double x, double y, double& r, double& theta) { const double TODEGREES = 180.0/3.141593; r = sqrt(x * x + y * y); theta = atan(y/x) * TODEGREES; return; } void showit(double radius, double angle) { cout << "\nThe polar coordinates are: " << endl; cout << " Distance from origin: " << radius << endl; cout << " Angle (in degrees) from x-axis: " << angle << endl; return; }