Fourth practice 1

任务描述

定义一个Rectangle类，有长itsWidth、宽itsLength等属性，重载其构造函数Rectangle()和Rectangle(int width， int length)。

测试输入：10，20

预期输出：

Rect1 width: 5
Rect1 length: 10
Enter a width: 10
Enter a length: 20
Rect2 width: 10
Rect2 length: 20

源代码

#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)
{
    this->itsWidth = width;
    this->itsLength = length;
}

int main()
{
    int width,length;
    cin>>width>>length;

    //输出初始构造函数的值
    Rectangle rc1;
    cout<<"Rect1 width: "<<rc1.GetWidth()<<endl;
    cout<<"Rect1 length: "<<rc1.GetLength()<<endl;
    //输入长和宽
    cout<<"Enter a width: "<<width<<endl;
    cout<<"Enter a length: "<<length<<endl;
    //输出重载后的构造函数的值
    Rectangle rc2(width,length);
    cout<<"Rect2 width: "<<rc2.GetWidth()<<endl;
    cout<<"Rect2 length: "<<rc2.GetLength()<<endl;
    return 0;
}