第九周项目3-分数类中的运算符重载（续）

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问题及代码：/* *Copyright (c) 2015,烟台大学计算机学院*All rights reserved.*文件名称：test.cop*作者：*完成日期：2015年5月17日*版本号：v1.0**问题描述： *输入描述：*输出描述：

#include <iostream>using namespace std;class CFraction{private:    int nume;  // 分子    int deno;  // 分母public:    //构造函数及运算符重载的函数声明    CFraction(int n=0,int d=1){nume=n;deno=d;}    friend ostream &operator<<(ostream &out,CFraction c);    friend istream &operator>>(istream &in,CFraction &c);    CFraction operator+();    CFraction operator-();    CFraction operator~();    void display();    void simply();    CFraction operator+(const CFraction &t);    CFraction operator-(const CFraction &t);    CFraction operator*(const CFraction &t);    CFraction operator /(const CFraction &t);    bool operator>(const CFraction &t);    bool operator<(const CFraction &t);    bool operator>=(const CFraction &t);    bool operator<=(const CFraction &t);    bool operator==(const CFraction &t);    bool operator!=(const CFraction &t);};//重载函数的实现及用于测试的main()函数void CFraction::display(){    cout<<nume<<"/"<<deno<<endl;}void CFraction::simply(){    int a,b,c;    if(nume>deno){a=nume;b=deno;}    else {a=deno;b=nume;}    while(a%b)    {        c=a%b;        a=b;        b=c;    }    nume=nume/b;    deno=deno/b;}ostream &operator<<(ostream&out,CFraction c){    out<<c.nume<<"/"<<c.deno<<endl;    return out;}istream &operator>>(istream&in,CFraction &c){    char a;    while(1)    {        in>>c.nume>>a>>c.deno;        if(c.deno!=0&&a=='/')break;        else            cout<<"输入格式错误，请从新输入："<<endl;    }}CFraction CFraction::operator-(){    nume=-nume;    return *this;}CFraction CFraction::operator+(){    return *this;}CFraction CFraction::operator~(){    int a;    a=nume;    nume=deno;    deno=a;    return *this;}CFraction CFraction::operator+(const CFraction &t){    CFraction c1;    c1.deno=deno*t.deno;    c1.nume=nume*t.deno+t.nume*deno;    c1.simply();    return c1;}CFraction CFraction::operator-(const CFraction &t){CFraction c1;    c1.deno=deno*t.deno;    c1.nume=nume*t.deno-t.nume*deno;    c1.simply();    return c1;}CFraction CFraction::operator*(const CFraction &t){    CFraction c1;    c1.deno=deno*t.deno;    c1.nume=nume*t.nume;    return c1;}CFraction CFraction::operator/(const CFraction &t){    CFraction c1;    c1.deno=deno*t.nume;    c1.nume=nume*t.deno;    return c1;}bool CFraction::operator>(const CFraction &t){    if(nume*t.deno>t.nume*deno)           return true;    else  return false;}bool CFraction::operator<(const CFraction &t){    if(nume*t.deno>t.nume*deno)        return false;    else return true;}bool CFraction::operator<=(const CFraction &t){    if(*this<t==true) return false;    else return true;}bool CFraction::operator>=(const CFraction &t){    if(*this>t==true) return false;    else return true;}bool CFraction::operator==(const CFraction &t){    if((*this>t==false)&&(*this<t==false)) return true;    else return false;}bool CFraction::operator!=(const CFraction &t){    if((*this==t)==false) return true;    else return false;}int main(){    CFraction x,y,s;    cout<<"输入x: ";    cin>>x;    cout<<"输入y: ";    cin>>y;    s=+x+y;    cout<<"+x+y="<<s<<endl;    s=x-y;    cout<<"x-y="<<s<<endl;    s=x*y;    cout<<"x*y="<<s<<endl;    s=x/y;    cout<<"x/y="<<s<<endl;    cout<<"-x="<<-x<<endl;    cout<<"+x="<<+x<<endl;    cout<<"x的倒数: "<<~x<<endl;    cout<<x;    if (x>y) cout<<"大于";    if (x<y) cout<<"小于";    if (x==y) cout<<"等于";    cout<<y<<endl;    return 0;}

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