第八周上机项目3分数类中的运算符重载

来源：互联网发布：数据分析考研专业编辑：程序博客网时间：2024/04/28 18:18
/* *Copyright (c) 2015, 烟台大学计算机学院 *All rights reserved. *文件名称：text.cpp *作者：陈栋梁 *完成日期：2015年 4 月 29日 *版本号：v1.0 * */#include <iostream>#include <Cmath>using namespace std;class CFraction{private:    int nume;    int deno;public:    CFraction(int nu=0,int de=1):nume(nu),deno(de) {}    void simplify();    void display();    CFraction operator+(const CFraction &c);    CFraction operator-(const CFraction &c);    CFraction operator*(const CFraction &c);    CFraction operator/(const CFraction &c);    bool operator>(const CFraction &c);    bool operator<(const CFraction &c);    bool operator==(const CFraction &c);    bool operator!=(const CFraction &c);    bool operator>=(const CFraction &c);    bool operator<=(const CFraction &c);};void CFraction::simplify(){    int m,n,r;    m=(fabs(deno));    n=(fabs(nume));    while(r=m%n)    {        m=n;        n=r;    }    deno/=n;    nume/=n;    if (deno<0)    {        deno=-deno;        nume=-nume;    }}void CFraction::display(){    cout<<"("<<nume<<"/"<<deno<<")"<<endl;}CFraction CFraction::operator+(const CFraction &c){    CFraction t;    t.nume=nume*c.deno+c.nume*deno;    t.deno=deno*c.deno;    t.simplify();    return t;}CFraction CFraction:: operator-(const CFraction &c){    CFraction t;    t.nume=nume*c.deno-c.nume*deno;    t.deno=deno*c.deno;    t.simplify();    return t;}CFraction CFraction:: operator*(const CFraction &c){    CFraction t;    t.nume=nume*c.nume;    t.deno=deno*c.deno;    t.simplify();    return t;}CFraction CFraction:: operator/(const CFraction &c){    CFraction t;    if (!c.nume) return *this;    t.nume=nume*c.deno;    t.deno=deno*c.nume;    t.simplify();    return t;}bool CFraction::operator>(const CFraction &c){    int this_nume,c_nume,common_deno;    this_nume=nume*c.deno;    c_nume=c.nume*deno;    common_deno=deno*c.deno;    if ((this_nume>c_nume&&common_deno>0)||(this_nume<c_nume&&common_deno<0)) return true;    return false;}bool CFraction::operator<(const CFraction &c){    int this_nume,c_nume,common_deno;    this_nume=nume*c.deno;    c_nume=c.nume*deno;    common_deno=deno*c.deno;    if ((this_nume-c_nume)*common_deno<0) return true;    return false;}bool CFraction::operator==(const CFraction &c){    if (*this!=c) return false;    return true;}bool CFraction::operator!=(const CFraction &c){    if (*this>c || *this<c) return true;    return false;}bool CFraction::operator>=(const CFraction &c){    if (*this<c) return false;    return true;}bool CFraction::operator<=(const CFraction &c){    if (*this>c) return false;    return true;}int main(){    CFraction x(1,3),y(-5,10),s;    cout<<"分数x=1/3      y=-5/10"<<endl;    s=x+y;    cout<<"x+y=";    s.display();    s=x-y;    cout<<"x-y=";    s.display();    s=x*y;    cout<<"x*y=";    s.display();    s=x/y;    cout<<"x/y=";    s.display();    x.display();    if (x>y) cout<<"大于"<<endl;    if (x<y) cout<<"小于"<<endl;    if (x==y) cout<<"等于"<<endl;    y.display();    cout<<endl;    return 0;}
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