学习十天的复习程序

 

#include <iostream>

using namespace std;

enum CHOICE...{
             DrawRect = 1,
             GetArea,
             GetPerim,
             ChangeDimensions,
             Quit};

class Rectangle
...{
public:
        Rectangle(int width,int height);
        ~Rectangle();

        int GetHeight() const
        ...{
            return itsHeight;
        }
        int GetWidth() const
        ...{
            return itsWidth;
        }
        int GetArea() const
        ...{
            return itsHeight*itsWidth;
        }
        int GetPerim() const
        ...{
            return 2*(itsHeight+itsWidth);
        }
        void SetSize(int newWidth,int newHeight);
     
private:
        int itsWidth;
        int itsHeight;
};

void Rectangle::SetSize(int newWidth , int newHeight)
...{
    itsWidth = newWidth;
    itsHeight = newHeight;
}

Rectangle::Rectangle(int width , int height)
...{
    itsWidth = width;
    itsHeight = height;
}
Rectangle::~Rectangle ()
...{
}

int DoMenu();
void DoDrawRect(Rectangle);
void DoGetArea(Rectangle);
void DoGetPerim(Rectangle);

int main()
...{
    Rectangle theRect(30,5);
    int choice = DrawRect;

    int fQuit = false;

    while(!fQuit)
    ...{
        choice = DoMenu();

        if(choice < DrawRect || choice > Quit )
        ...{
            cout << " Invaid Choice ,try again.";
            cout << endl << endl;

            continue;
        }

        switch(choice)
        ...{
             case DrawRect:
                DoDrawRect(theRect);
                break;
             case GetArea:

                 DoGetArea(theRect);
                 break;
             case GetPerim:
                 DoGetPerim(theRect);
                 break;
             case ChangeDimensions:

                 int newLength,newWidth;
                 cout << " New width:";
                 cin >> newWidth;
                 cout << " New height: ";
                 cin >> newLength;

                 theRect.SetSize(newWidth , newLength);
                 DoDrawRect(theRect);
                 break;

             case Quit:

                 fQuit = true;
                 cout <<" Exiting ... " << endl << endl;
                 break;

             default:
                 cout << "Error in choice!"<< endl;
                 fQuit = true;
                 break;
    }
    }
    return 0;
}
int DoMenu()
...{
    int choice;
    cout << endl << endl;
    cout << "***** Menu*****" << endl;
    cout << "(1) Draw Rectangle:"<< endl;
    cout << "(2) Area:"          << endl;
    cout << "(3) Perimeter:    " << endl;
    cout << "(4) Resize:     "   << endl;
    cout << "(5) Quit:"          << endl;

        cin >> choice;
    return choice;
}

void DoDrawRect(Rectangle theRect)
...{
    int heigth = theRect.GetHeight();
    int width = theRect.GetWidth();

    for ( int i = 0;i < heigth; i++)
    ...{
        for (int j =0; j< width;j++)
            cout <<"*";
        cout << endl;
    }
}

void DoGetArea(Rectangle theRect)
...{
    cout << "Area: " << theRect.GetArea() << endl;
}
void DoGetPerim(Rectangle theRect)
...{        
    cout << "Perimeter: " << theRect.GetPerim() << endl;
}