第八周实验报告（三）

#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);

};

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;

a.input();
b.input();
cout<<"计算分数";
a.output();
cout<<"与";
b.output();
cout<<"和";
c=a+b;
c.simplify();
c.output();

cout<<"差";
c=a-b;
c.simplify();
c.output();

cout<<"乘";
c=a*b;
c.simplify();
c.output();

cout<<"除";
c=a/b;
c.simplify();
c.output();

cout<<"对分数";
a.output();
cout<<"求反";
-a;
a.output();

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;

}