第八周任务四

一时失言乱红尘 2022-06-13 10:19 463阅读 0赞

/* 
    实验内容:实现分数的运算符重载 
    * 程序的版权和版本声明部分  
    * Copyright (c) 2011, 烟台大学计算机学院学生  
    * All rights reserved.  
    * 文件名称： 实现分数的运算符重载                          
    * 作    者：  薛广晨                             
    * 完成日期：  2012       年  4    月  7      日  
    * 版 本号：  x1.0           
    */
    //【任务4】在任务3的基础上拓展。分数类中的对象可以和整型数进行四则运算，且运算符合交换律。例如：CFraction a(1,3),b; int i=2; 可以完成b=a+i;。同样，可以完成i+a, 45+a, a*27, 5/a等各种运算。
    #include<iostream>
    
    using namespace std;
    
    class CFraction
    {
    private:
    	int nume;  // 分子
    	int deno;  // 分母
     public:
    	CFraction(int nu = 0, int de = 1) : nume(nu), deno(de){};   //构造函数，初始化用
    	void output();
    	void output1();
    
    	CFraction operator+(CFraction &c1);
    	friend CFraction operator+(CFraction &c1, int &a);
    	friend CFraction operator+(int &a, CFraction &c1);
    
    	CFraction operator-(CFraction &c1);
    	friend CFraction operator-(CFraction &c1, int &a);
    	friend CFraction operator-(int &a, CFraction &c1);
    
    	CFraction operator*(CFraction &c1);
    	friend CFraction operator*(CFraction &c1, int &a);
    	friend CFraction operator*(int &a, CFraction &c1);
    
    	CFraction operator/(CFraction &c1);
    	friend CFraction operator/(CFraction &c1, int &a);
    	friend CFraction operator/(int &a, CFraction &c1);
    
    	CFraction operator-();//取反
    
    	//比较运算符(二目)的重载
    	bool operator > (CFraction &c1);
    	bool operator < (CFraction &c1);
    	bool operator >= (CFraction &c1);
    	bool operator <= (CFraction &c1);
    	bool operator == (CFraction &c1);
    	bool operator != (CFraction &c1);
    
    };
    
    CFraction CFraction :: operator+(CFraction &c1)
    { 
    	CFraction c2;  
        c2.deno = deno * c1.deno;  
        c2.nume = nume * c1.deno + c1.nume * deno;  
        return c2;  
    }  
    
    CFraction operator+(CFraction &c1, int &a)
    { 
    	CFraction c2;  
        c2.deno = c1.deno;  
        c2.nume = c1.nume + a * c1.deno;  
        return c2;  
    } 
    
    CFraction operator+(int &a, CFraction &c1)
    { 
    	CFraction c2;  
        c2.deno = c1.deno;  
        c2.nume = c1.nume + a * c1.deno;  
        return c2;   
    } 
    CFraction CFraction :: operator-(CFraction &c1)
    {  
    	CFraction c2;  
        c2.deno = deno * c1.deno;  
        c2.nume = nume * c1.deno - c1.nume * deno;  
        return c2;  
    }  
    
    CFraction operator-(CFraction &c1, int &a)
    {  
    	CFraction c2;  
        c2.deno = c1.deno;  
        c2.nume = c1.nume - a * c1.deno;  
        return c2;  
    }  
    
    CFraction operator-(int &a, CFraction &c1)
    {  
    	CFraction c2;  
        c2.deno = c1.deno;  
        c2.nume = c1.nume - a * c1.deno;  
        return c2;   
    }  
    
    CFraction CFraction :: operator*(CFraction &c1)
    {  
    	CFraction c2;  
        c2.deno = deno * c1.deno;  
        c2.nume = nume * c1.nume;  
        return c2;  
    }  
    
    CFraction operator*(CFraction &c1, int &a)
    {  
    	CFraction c2;  
        c2.deno = c1.deno;  
        c2.nume = c1.nume * a;  
        return c2;  
    }  
    
    CFraction operator*(int &a, CFraction &c1)
    {  
    	CFraction c2;  
        c2.deno = c1.deno;  
        c2.nume = c1.nume * a;  
        return c2;  
    }  
    
    CFraction CFraction :: operator/(CFraction &c1)
    {  
    	CFraction c2;  
        c2.deno = deno * c1.nume;  
        c2.nume = nume * c1.deno;  
        return c2;  
    }  
    
    CFraction operator/(CFraction &c1, int &a)
    {  
    	CFraction c2;  
        c2.deno = c1.deno * a;  
        c2.nume = c1.nume;  
        return c2;  
    }  
    CFraction operator/(int &a, CFraction &c1)
    {  
    	CFraction c2;  
    	c2.deno = c1.nume;  
    	c2.nume = c2.deno * a;  
        return c2;  
    }  
    
    CFraction CFraction :: operator-()//取反
    {
    	CFraction c2; 
    	c2.nume = -nume;
    	c2.deno = deno;
    
    	return c2;
    }
    
    void CFraction :: output()  
    {  
    	int i;  
        if(deno == 0)  
        cout<<"error"<<endl; 
    	if(nume >= 0)
    	{
    		if(deno < nume)i = deno;
    	    else i = nume;
    	    for(; i > 0; --i)
    	    {
    			if(nume % i == 0 && deno % i == 0)
    		    {
    				nume = nume / i;
    			    deno = deno / i;
    			    break;
    	        }
             }
    	     cout << nume << "/" << deno << endl; 
    	}
    	else 
    	{
    		nume = -nume;
    		if(deno < nume)i = deno;
    	    else i = nume;
    	    for(; i > 0; --i)
    	    {
    			if(nume % i == 0 && deno % i == 0)
    		    {
    				nume = nume / i;
    			    deno = deno / i;
    			    break;
    	        }
             }
    	     cout << -nume << "/" << deno << endl; 
    	}
    
    }  
    
    void CFraction :: output1()  
    {  
    	cout << nume << "/" << deno << endl;  
    } 
    
    //比较运算符(二目)的重载
    bool CFraction :: operator > (CFraction &c1)
    {
    	CFraction c2, c3;
    	c2.nume = nume * c1.deno;
    	c3.nume = c1.nume * deno;
    	if(c2.nume > c3.nume)return true;
    	else return false;
    }
    
    bool CFraction :: operator < (CFraction &c1)
    {
    	CFraction c2, c3;
    	c2.nume = nume * c1.deno;
    	c3.nume = c1.nume * deno;
    	if(c2.nume < c3.nume)return true;
    	else return false;
    }
    
    bool CFraction :: operator >= (CFraction &c1)
    {
    	CFraction c2, c3;
    	c2.nume = nume * c1.deno;
    	c3.nume = c1.nume * deno;
    	if(c2.nume < c3.nume)return false;
    	else return true;
    }
    
    bool CFraction :: operator <= (CFraction &c1)
    {
    	CFraction c2, c3;
    	c2.nume = nume * c1.deno;
    	c3.nume = c1.nume * deno;
    	if(c2.nume > c3.nume)return false;
    	else return true;
    }
    
    bool CFraction :: operator == (CFraction &c1)
    {
    	CFraction c2, c3;
    	c2.nume = nume * c1.deno;
    	c3.nume = c1.nume * deno;
    	if((c2.nume >= c3.nume) && (c2.nume <= c3.nume))return true;
    	else return false;
    }
    
    bool CFraction :: operator != (CFraction &c1)
    {
    	CFraction c2, c3;
    	c2.nume = nume * c1.deno;
    	c3.nume = c1.nume * deno;
    	if((c2.nume > c3.nume) || (c2.nume < c3.nume))return true;
    	else return false;
    }
    
    void main()
    {
    	int i = 2, m = 3 ;
    	CFraction c1(3, 6), c2(1,4), c3;
    	cout << "c1 = ";
    	c1.output1();
    
    	cout << "c2 = ";
    	c2.output1();
    
    	c3 = c1 + c2;
    	cout << "c1 + c2 = ";
    	c3.output();
        
    	c3 = c1 - c2;
    	cout << "c1 - c2 = ";
    	c3.output();
    
    	c3 = c1 * c2;
    	cout << "c1 * c2 = ";
    	c3.output();
    
    	c3 = c1 / c2;
    	cout << "c1 / c2 = ";
    	c3.output();
    
    	c3 = -c1;
    	cout << "-c1 = ";
    	c3.output();
    
    	cout << endl;
    	
    	cout<<"下面比较两个分数的大小：\n";
    	if (c1 > c2) cout << "c1 > c2" << endl;
    	if (c1 < c2) cout << "c1 < c2" << endl;
    	if (c1 == c2) cout << "c1 ＝ c2" << endl; 
    	if (c1 != c2) cout << "c1 ≠ c2" << endl;
    	if (c1 >= c2) cout << "c1 ≥ c2" << endl;
    	if (c1 <= c2) cout << "c1 ≤ c2" << endl;
    	cout<<endl;
        
    	c3 = c1 + i;
    	cout << "c1 + 2 = ";
    	c3.output();
    
    	c3 = i + c1;
    	cout << "2 + c1 = ";
    	c3.output();
    
    	c3 = c1 - i;
    	cout << "c1 - 2 = ";
    	c3.output();
    
    	c3 = i - c1;
    	cout << "2 - c1 = ";
    	c3.output();
    
    	c3 = c1 * m;
    	cout << "c1 * 3 = ";
    	c3.output();
    
    	c3 = m * c1;
    	cout << "3 *  c1= ";
    	c3.output();
    
    	c3 = c1 / m;
    	cout << "c1 ÷ 3 = ";
    	c3.output();
    
        c3 = m / c1;
    	cout << "3 ÷ c1 = ";
    	c3.output();
    
    	system("pause");
    }

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上机感言：敲完这几个程序，就有种飞一般的感觉

[1333800589_6968.jpg]: https://img-my.csdn.net/uploads/201204/07/1333800589_6968.jpg