Assume the existence of a Window class with a function getWidth that returns the width of the window. Define a derived class WindowWithBorder that contains a single additional integer instance variable named borderWidth, and has a constructor that accepts an integer parameter which is used to initialize the instance variable. There is also a function getUseableWidth, that returns the width of the window minus the width of the border.

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This is the answer:

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class WindowWithBorder :public Window
{
private:
int borderWidth;
public:
WindowWithBorder(int a){borderWidth=a;}
int getUseableWidth();
};

int WindowWithBorder::getUseableWidth()
{
return (getWidth() - borderWidth);
}

Comments

  1. AnonymousApril 9, 2020 at 11:45 PM

    Another answer:

    class WindowWithBorder: public Window {
    public:
    WindowWithBorder(int borderWidth);
    int getUseableWidth();
    private:
    int borderWidth;
    };
    WindowWithBorder::WindowWithBorder(int borderWidth) : borderWidth(borderWidth) {}
    int WindowWithBorder::getUseableWidth() {return getWidth() - borderWidth;}

    ReplyDelete

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