zoukankan      html  css  js  c++  java
  • c++例题 构造函数(一)

    题目来自:http://blog.csdn.net/sxhelijian/article/details/8723847

    【项目1拓展(选做)】请自行设计一个矩形类,可以计算矩形的面积、周长、对象线,判断是否是正方形。请用上类似的构造函数,自己设计main()函数,对设计的类进行测试。

    #include <iostream>
    #include <cmath>
    using namespace std;
    
    class Rectangle
    {
    private:
    	double length;
    	double width;
    public:
    	Rectangle():length(1),width(1){}
    	Rectangle(double len,double wid):length(len),width(wid){}
    //   Rectangle(double len=1,double wid =1):length(len),width(wid){}
    
    	double area(void);
    	double perimeter(void){ return 2*(length+width); }
    	double diagonal(void) { return sqrt(length*length+width*width); }
    	
    	bool square_or_not(void) { return length==width?true:false; }
        void show_message(void);
    };
    
    //Rectangle::Rectangle(double len,double wid){length = len;width = wid;}
    
    double Rectangle::area(void)
    {
    	return length*width;
    }
    
    void Rectangle::show_message(void)
    {
    	cout << "矩形的长宽分别为: " << length << '\t' << width <<endl;
    	cout << "周长: " << perimeter() << "面积: " << area() << "对角线长度: "<< diagonal() << endl;
    	cout << "是否为正方形? " << square_or_not() << endl;
    
    }
    
    
    int main()
    {
    	Rectangle rect1;
    	rect1.show_message();
    
    	Rectangle rect2(3,4);
    	rect2.show_message();
    
    	return 0;
    }


     

  • 相关阅读:
    uva11025 The broken pedometer
    uva131 The Psychic Poker Player
    子集生成算法
    uva10167 Birthday Cake
    poj1129 Channel Allocation
    poj2676 Sudoku
    Emacs杂谈(一)Emacs环境 c++ 快捷键
    poj1416 Shredding Company
    英文报刊推荐
    搜索练习(二)工作效益
  • 原文地址:https://www.cnblogs.com/javawebsoa/p/2987539.html
Copyright © 2011-2022 走看看