list1003.cpp

teach yourself C++ in 21 days 第五版

 // Listing 10.3 - Overloading constructors
 
 #include <iostream>
 using namespace std;
 
 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;
 }