第九周实验报告（三）

来源：互联网发布：数据加密系统编辑：程序博客网时间：2024/06/01 10:01
接第八周实验任务3，定义分数类中<<与>>运算符重载，实现分数类的输入与输出。
#include <iostream>        using namespace std;        class CFraction    {    private:                    int nu;        int de;        char c;            public:       CFraction(int nu = 0,int de = 1);            void set(int nu = 0,int de  = 1);            void input();            void simplify();             void output();        CFraction operator +(CFraction &a);        CFraction operator -(CFraction &a);        CFraction operator *(CFraction &a);        CFraction operator /(CFraction &a);        CFraction operator -();        bool operator>( CFraction &c);        bool operator<( CFraction &c);        bool operator==( CFraction &c);        bool operator!=( CFraction &c);        bool operator>=( CFraction &c);        bool operator<=( CFraction &c);          friend ostream & operator <<(ostream &,CFraction &);      friend istream & operator >>(istream &,CFraction &);  };      ostream & operator <<(ostream &output,CFraction &t){         output << t.nu << "/" <<t.de;        cout<<endl;        return output;        }  istream & operator >>(istream &input,CFraction &t){        input>>t.nu>>t.de;        return input;}void CFraction::input()    {        cout<<"输入分数按照nu/de格式"<<endl;        cin>>nu;        cin>>c;        cin>>de;    }        void CFraction::simplify()    {        int x;        if(nu>de)            x = de;        else             x = nu;                for(int i = 2; i<=x;i++)        {            if(nu%i==0&& de%i==0)            {                nu = nu/i;                de = de/i;                            i = 1;            }        }    }        CFraction::CFraction(int n,int d)    {                             nu = n;                             de = d;    }     CFraction CFraction::operator +(CFraction &a)  {      CFraction c;      c.nu = a.nu*de+nu*a.de;      c.de = a.de*de;      return c;  }    CFraction CFraction::operator -(CFraction &a)  {      CFraction c;      c.nu = nu*a.de - a.nu*de;      c.de = a.de*de;      return c;  }    CFraction CFraction::operator *(CFraction &a)  {      CFraction c;      c.nu = nu*a.nu;      c.de = de*a.de;      return c;  }    CFraction CFraction::operator /(CFraction &a)  {      CFraction c;      c.nu = a.nu*de;      c.de = a.de*nu;      return c;  }    CFraction CFraction::operator -()  {      CFraction c;      c.de = -de;      c.nu = -nu;      return c;  }      void CFraction::output()  {      cout<<nu<<"/"<<de<<endl;  }  bool CFraction::operator>(CFraction &c)    {      if((nu*c.de - de*c.nu)>0)      return true;      else       return false;        }        // 分数比较大小    bool CFraction::operator<( CFraction &c)    {        if((nu*c.de - de*c.nu)<0)      return true;      else       return false;     }        // 分数比较大小  bool CFraction::operator==( CFraction &c)    {        if((nu*c.de - de*c.nu)==0)      return true;      else       return false;    }        // 分数比较大小    bool CFraction::operator!=( CFraction &c)    {        if((nu*c.de - de*c.nu)==0)      return false;      else       return true;    }        // 分数比较大小    bool CFraction::operator>=( CFraction &c)    {        if((nu*c.de - de*c.nu)>=0)      return true;      else       return false;    }        // 分数比较大小    bool CFraction::operator<=( CFraction &c)    {        if((nu*c.de - de*c.nu)<0)      return true;      else       return false;    }                        int main()    {        CFraction a,b,c;      int t;      cout<<"请输入分数a的值"<<endl;    cin>>a;     cout<<"请输入分数b的值"<<endl;      cin>>b;      cout<<"计算分数";      cout<<a;      cout<<"与";      cout<<b;      cout<<"和";      c=a+b;      c.simplify();      cout<<c;       cout<<"差";      c=a-b;      c.simplify();      cout<<c;        cout<<"乘";      c=a*b;      c.simplify();      cout<<c;        cout<<"除";      c=a/b;      c.simplify();      cout<<c;            cout<<"对分数";                           cout<<a;      cout<<"求反";      -a;      cout<<a;              if (a>b) cout<<"大于"<<endl;        if (a<b) cout<<"小于"<<endl;        if (a==b) cout<<"等于"<<endl;          system("pause");        return 0;        }