Can some body please help me with this c++ assignment I've been working on for hours. It's on friends lists.

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I have no clue how to do this i've been working on it for hours. There is only one example of friend classes in my textbook.

This is the question"Construct a class named Coord containing two double-precision variables named xval and yval, used to store the x and y values of a point in rectangular coordinates. The class methods should include constructor and display methods and a friend function named convPol(). The convPol() function should accept two double-precision numbers, r and theta, representing a point in polar coordinates and convert them into rectangular coordinates. For conversion from polar to rectangular coordinates, use these formulas: x = r cos(theta) y = r sin(theta)"

This is what i've come up with but I know i'm not doing it wrong I just don't have a good reference point since there's only one lousy example in the whole textbook and is almost completely different. to be more specific I don't know where to use coord&(how to reference the number) and I know I shouldn't have used pointers. Can somebody point me in the right direction please?

This is my code:

#include <iostream>
#include <cmath>
using namespace std;
//ƒclassƒdeclarationƒsection
void ConvPol(double r,double theta, double& xval, double& yval)
{ 
double x,y;
 xval=r*cos(theta);
 yval=r*sin(theta);
 return;
}

class Coord
{
  //ƒfriendsƒlist
  friend double ConvPol(Coord&);
  private:
  double xval;
  double yval;
  public:

    Coord (double = 0, double = 0);  //ƒconstructor
    void display();
};
//ƒclassƒimplementationƒsection
Coord::Coord(double x, double y)
{
  xval = x;
  yval = y;

}
void Coord::display()
{
cout <<xval<<","<<yval;
  return;
}
//ƒfriendƒimplementations
void time(double, double, double&, double&);

int main()
{ double xval,yval;
  ConvPol(1,5,xval,yval);
  Coord a(xval,yval); 
  a.display();
  return 0;
}

asked 20 secs ago

Thejohn831

1

Can some body please help me with this c++ assignment I've been working on for hours. It's on friends lists.