第八周 项目三：分数类中的运算符重载

/** 程序的版权和版本声明部分* Copyright (c)2013, 烟台大学计算机学院学生* All rightsreserved.* 作    者：   李 洋* 完成日期： 2013 年 4 月  20 日* 版本号： v1.0* 输入描述：* 问题描述：* 输出：*/#include<iostream>using namespace std;int gcd(int m, int n);class CFraction{private:    int nume;  // 分子    int deno;  // 分母public:CFraction(int nu=0,int de=1);   //构造函数，初始化用void set(int nu=0,int de=1);    //置值，改变值时用void simplify();void display();CFraction operator+(CFraction &c);CFraction operator-(CFraction &c);CFraction operator*(CFraction &c);CFraction operator/(CFraction &c);CFraction operator-();    //求反bool operator>(CFraction &c);bool operator<(CFraction &c);bool operator==(CFraction &c);};CFraction::CFraction(int nu,int de){    nume=nu;    deno=de;}void CFraction::set(int nu,int de){    nume=nu;    deno=de;}void CFraction::simplify(){int m=gcd(nume,deno);deno/=m;nume/=m;}void CFraction::display(){    cout<<nume<<"/"<<deno<<endl;}// 求m，n的最大公约数int gcd(int m, int n){int min;if(m<n){    for(min=m;min>0;--min)    {        if(m%min==0&&n%min==0)                return min;    }}else{        for(min=n;min>0;--min)    {        if(m%min==0&&n%min==0)                return min;    }}}CFraction CFraction::operator+(CFraction &c){    return CFraction(nume*c.deno+deno*c.nume,deno*c.deno);}CFraction CFraction::operator-(CFraction &c){    return CFraction(nume*c.deno-deno*c.nume,deno*c.deno);}CFraction CFraction::operator*(CFraction &c){    return CFraction(nume*c.nume,deno*c.deno);}CFraction CFraction::operator/(CFraction &c){    return CFraction(nume*c.deno,deno*c.nume);}CFraction CFraction::operator-(){    return CFraction(deno,nume);}bool CFraction::operator>(CFraction &c){    if(nume*c.deno>deno*c.nume)return true;    elsereturn false;}bool CFraction::operator<(CFraction &c){    if(nume*c.deno<deno*c.nume)return true;    elsereturn false;}bool CFraction::operator==(CFraction &c){    if(nume*c.deno==deno*c.nume)return true;    elsereturn false;}int main(){    CFraction c1(1,2),c2(2,3),c3;    cout<<"c1= ";    c1.display();    c1.simplify();    cout<<"c2= ";    c2.display();    c2.simplify();    c3=c1+c2;    c3.simplify();    cout<<"c1+c2= ";    c3.display();    c3=c1-c2;    cout<<"c1-c2= ";    c3.display();    c3=c1*c2;    c3.simplify();    cout<<"c1*c2= ";    c3.display();    c3=c1/c2;    c3.simplify();    cout<<"c1/c2= ";    c3.display();    c3=-c1;    cout<<"c1求反为：";    c3.display();    cout<<"下面比较两个分数大小：\n";if(c1>c2)        cout<<"c1>c2"<<endl;if(c1<c2)        cout<<"c1<c2"<<endl;if(c1==c2)        cout<<"c1=c2"<<endl;return 0;}