项目3

#include<iostream>using namespace std;class  CFraction{private:int nume;    int deno;public:CFraction(int n=1,int d=1):nume(n),deno(d){};    CFraction  operator+(CFraction &c);    CFraction  operator-(CFraction &c);    CFraction  operator*(CFraction &c);    CFraction  operator/(CFraction &c);    CFraction  operator-();    bool  operator>(CFraction &c);    CFraction  simply(CFraction &c);    friend int divisor(CFraction &c);    friend int multiple(CFraction &c);    void display();};CFraction CFraction::operator+(CFraction &c){      CFraction a;     a.deno=deno*c.deno;      a.nume=nume*c.deno+c.nume*deno;      a=simply(a);      return a;  }CFraction  CFraction::operator-(CFraction &c){      CFraction a;      a.deno=deno*c.deno;      a.nume=nume*c.deno-c.nume*deno;      a=simply(a);      return a;}CFraction  CFraction::operator*(CFraction &c){    CFraction a;    a.deno=deno*c.deno;    a.nume=nume*c.nume;    a=simply(a);      return a;}CFraction  CFraction::operator/(CFraction &c){    CFraction a;    a.nume=nume*c.deno;    a.deno=deno*c.nume;    a=simply(a);      return a;}CFraction  CFraction::operator-(){     CFraction a;    a.deno=nume;    a.nume=deno;    a=simply(a);      return a;}bool CFraction::operator>(CFraction &c){    if(nume/deno>c.nume/c.deno)    return true;    else    return false;}CFraction  CFraction::simply(CFraction &c){      CFraction a;    int b=divisor(c);    a.nume=c.nume/b;    a.deno=c.deno/b;    return a;    }int divisor(CFraction &c){     int n=min(c.deno,c.nume);    for(int i=n;i>=0;i--){        if(c.deno%i==0 && c.nume%i==0){          return i;          break;        }    }}/*int multiple(CFraction &c){  int n=max(c.deno,deno);   while(n>0){    if(n%c.deno==0 && n%deno==0){        return n;        break;    }else{    n++;    }   }}*/void CFraction::display(){cout<<nume<<"/"<<deno<<endl;}int main(){   CFraction t1(3,4),t2(3,2),t3,t4,t5;  cout<<"t1+t2=";   t3=t1+t2;   t3.display();   cout<<"t2-t1=";   t3=t2-t1;   t3.display();   cout<<"t1*t2=";   t3=t1*t2;   t3.display();   cout<<"t1/t2=";   t3=t1/t2;   t3.display();   cout<<"去倒数";   t3=-t1;   t3.display();   if(t1>t2){  cout<<"t1>t2"<<endl;   }else{   cout<<"t1<t2"<<endl;   }  return 0;}

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