5.12-重栽构造函数.cpp

Visual C++的课件

// Listing 10.3
// Overloading constructors

#include <iostream.h>

class Rectangle
{
public:
	Rectangle();
	Rectangle(int width, int length);
	~Rectangle() {}
	int GetWidth() const { return itsWidth; }
	int GetLength() const { return itsLength; }
private:
	int itsWidth;
	int itsLength;
};

Rectangle::Rectangle()
{
	itsWidth = 5;
	itsLength = 10;
}

Rectangle::Rectangle (int width, int length)
{
	itsWidth = width;
	itsLength = length;
}

int main()
{
	Rectangle Rect1;
	cout << "Rect1 width: " << Rect1.GetWidth() << endl;
	cout << "Rect1 length: " << Rect1.GetLength() << endl;

	int aWidth, aLength;
	cout << "Enter a width: ";
	cin >> aWidth;
	cout << "\nEnter a length: ";
	cin >> aLength;

	Rectangle Rect2(aWidth, aLength);
	cout << "\nRect2 width: " << Rect2.GetWidth() << endl;
	cout << "Rect2 length: " << Rect2.GetLength() << endl;
	return 0;
}