项目一——分数类运算符重载3

来源：互联网发布：qq怎么发淘宝链接编辑：程序博客网时间：2024/06/05 21:26
问题及代码：
/*copyright(c)2016.烟台大学计算机学院 * All rights reserved, * 文件名称：text.Cpp * 作者：李一波 * 完成日期：2016年5月30日 * 版本号：vc++6.0 * * 问题描述:实现分数类中的运算符重载，在分数类中可以完成分数的加减乘除（运算后再化简）、比较（6种关系）的运算。 * 输入描述: * 程序输出： */#include <iostream>using namespace std;class CFraction{private:    int nume;  // 分子    int deno;  // 分母public:    CFraction(){}    CFraction(int n,int d):nume(n),deno(d){}    void show();    friend istream &operator>>(istream &in,CFraction &x);    friend ostream &operator<<(ostream &out,CFraction x);    CFraction operator+(const CFraction &a);    CFraction operator-(const CFraction &a);    CFraction operator*(const CFraction &a);    CFraction operator/(const CFraction &a);    CFraction operator+(const int &a);    CFraction operator-(const int &a);    CFraction operator*(const int &a);    CFraction operator/(const int &a);    bool operator>(const CFraction &a);    bool operator<(const CFraction &a);    bool operator>=(const CFraction &a);    bool operator<=(const CFraction &a);    bool operator==(const CFraction &a);    bool operator!=(const CFraction &a);    CFraction hua_jian();    CFraction operator+();    CFraction operator-();    CFraction operator~();};istream &operator>>(istream &in,CFraction &x){    char ch;    while(1)    {        cin>>x.nume>>ch>>x.deno;        if (x.deno==0)            cerr<<"分母为0, 请重新输入\n";        else if(ch!='/')            cerr<<"格式错误（形如m/n）! 请重新输入\n";        else            break;    }    return cin;}// 重载输出运算符<<ostream &operator<<(ostream &out,CFraction x){    cout<<x.nume<<'/'<<x.deno;    return cout;}CFraction CFraction::operator+()//取正数{    return this->hua_jian();}CFraction CFraction::operator-()//取负数{    CFraction c;    c.nume=-nume;    c.deno=-deno;    return c;}CFraction CFraction::operator~()//取倒数{    CFraction c;    c.deno=nume;    c.nume=deno;    if(c.deno<0)    {        c.deno=-c.deno;        c.nume=-c.nume;    }    return c.hua_jian();}CFraction CFraction::operator+(const CFraction &a){    CFraction c;    if(deno==a.deno)        c.nume=nume+a.nume;    else    {        c.deno=deno*a.deno;        c.nume=nume*a.deno+a.nume*deno;    }    return c.hua_jian();}CFraction CFraction::operator-(const CFraction &a){    CFraction c;    if(deno==a.deno)        c.nume=nume-a.nume;    else    {        c.deno=deno*a.deno;        c.nume=nume*a.deno-a.nume*deno;    }    return c.hua_jian();}CFraction CFraction::operator*(const CFraction &a){    CFraction c;    c.deno=deno*a.deno;    c.nume=nume*a.nume;    return c.hua_jian();}CFraction CFraction::operator/(const CFraction &a){    CFraction c;    c.deno=deno*a.nume;    c.nume=nume*a.deno;    return c.hua_jian();}CFraction CFraction::operator+(const int &a){    CFraction c;    c.deno=deno;    c.nume=nume+deno*a;    return c.hua_jian();}CFraction CFraction::operator-(const int &a){    CFraction c;    c.deno=deno;    c.nume=nume-deno*a;    return c.hua_jian();}CFraction CFraction::operator*(const int &a){    CFraction c;    c.deno=deno;    c.nume=nume*a;    return c.hua_jian();}CFraction CFraction::operator/(const int &a){    CFraction c;    c.deno=deno*a;    c.nume=nume;    return c.hua_jian();}bool CFraction::operator>(const CFraction &a){    if(deno==a.deno)        if(nume>a.nume)            return 1;        else            return -1;    else    {        if(nume*a.deno>a.nume*deno)            return 1;        else            return -1;    }}bool CFraction::operator<(const CFraction &a){    if(deno==a.deno)        if(nume<a.nume)            return 1;        else            return -1;    else    {        if(nume*a.deno<a.nume*deno)            return 1;        else            return -1;    }}bool CFraction::operator>=(const CFraction &a){    if(deno==a.deno)        if(nume>=a.nume)            return 1;        else            return -1;    else    {        if(nume*a.deno>=a.nume*deno)            return 1;        else            return -1;    }}bool CFraction::operator<=(const CFraction &a){    if(deno==a.deno)        if(nume<=a.nume)            return 1;        else            return -1;    else    {        if(nume*a.deno<=a.nume*deno)            return 1;        else            return -1;    }}bool CFraction::operator==(const CFraction &a){    if(deno==a.deno)        if(nume==a.nume)            return 1;        else            return -1;    else    {        if(nume*a.deno==a.nume*deno)            return 1;        else            return -1;    }}bool CFraction::operator!=(const CFraction &a){    if(deno==a.deno)        if(nume!=a.nume)            return 1;        else            return -1;    else    {        if(nume*a.deno!=a.nume*deno)            return 1;        else            return -1;    }}CFraction CFraction::hua_jian(){    int t,t1,t2;    t1=nume;    t2=deno;    while(t2!=0)    {        t=t1%t2;        t1=t2;        t2=t;    }    nume/=t1;    deno/=t1;    if(deno<0)    {        deno=-deno;        nume=-nume;    }    return *this;}void CFraction::show(){    cout<<nume<<'/'<<deno<<endl;}//重载函数的实现及用于测试的main()函数int main(){    CFraction c1(2,3),c2(5,6),c3;    int i=2;    c3=c1+c2;    cout<<"c1+c2之和是：";    c3.show();    c3=c1-c2;    cout<<"c1-c2之差是：";    c3.show();    c3=c1*c2;    cout<<"c1*c2是：";    c3.show();    c3=c1/c2;    cout<<"c1/c2是：";    c3.show();    c3=c1+i;    cout<<"c1+i之和是：";    c3.show();    c3=c1-i;    cout<<"c1-i之差是：";    c3.show();    c3=c1*i;    cout<<"c1*i是：";    c3.show();    c3=c1/i;    cout<<"c1/i是：";    c3.show();    if((c1>c2)==1)        cout<<"c1大于c2"<<endl;    else        cout<<"c1小于c2"<<endl;    if((c1<c2)==1)        cout<<"c1小于c2"<<endl;    else        cout<<"c1大于c2"<<endl;    if((c1>=c2)==1)        cout<<"c1大于等于c2"<<endl;    else        cout<<"c1小于c2"<<endl;    if((c1<=c2)==1)        cout<<"c1小于等于c2"<<endl;    else        cout<<"c1大于c2"<<endl;    if((c1==c2)==1)        cout<<"c1等于c2"<<endl;    else        cout<<"c1不等于c2"<<endl;    if((c1!=c2)==1)        cout<<"c1不等于c2"<<endl;    else        cout<<"c1等于c2"<<endl;    cout<<"-c1="<<-c1<<endl;    cout<<"+c1="<<+c1<<endl;    cout<<"c1的倒数: "<<~c1<<endl;    return 0;}
运行结果：
0 0