polar to cartesian converter

polartocartesian.cpp

/// this is just some code snippets i do in some exercise in the book i'vs studied i thought it could be useful to some people
/// about this class
/// object.CoordDisplay(); - displays the converted values
/// object.conToCartesian(); - converts the following argument values into cartesian values
/// you can edit this code if you want
//// declare a class Coord before using one of the class methods..

#include <iostream>
#include <cmath>

using namespace std;

class Coord{
private:
    double xval;
    double yval;
public:
    Coord(double x = 0, double y = 0)
         {xval = x; yval = y;}

    void CoordDisplay();
    void convToCartesian(double, double);
};

void Coord::CoordDisplay()
{
    cout << "cartesian coordinates"
         << "\nx: " << xval
         << "\ny: " << yval << endl;

    return;
}

void Coord::convToCartesian(double r, double theta)
{
    xval = r * cos(theta);
    yval = r * sin(theta);

    return;
}

int main()
{
    Coord a;
    a.convToCartesian(12,12);
    a.CoordDisplay();


    return 0;
}