#include <iostream>
using namespace std;
class CFraction
{
private:
int nume; // 分子
int deno; // 分母
public:
CFraction(int nu=0,int de=1):nume(nu),deno(de){}
void simplify();
void display();
CFraction operator+(const CFraction &c); //两个分数相加,结果要化简
CFraction operator-(const CFraction &c); //两个分数相减,结果要化简
CFraction operator*(const CFraction &c); //两个分数相乘,结果要化简
CFraction operator/(const CFraction &c); //两个分数相除,结果要化简
CFraction operator+(); //取正一目运算
CFraction operator-(); //取反一目运算
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);
friend istream &operator>>(istream &input, CFraction &d);
friend ostream &operator<<(ostream &output, CFraction &d);
};
// 分数化简
void CFraction::simplify()
{
int m, n, r;
m=abs(deno);
n=abs(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;
}
CFraction CFraction:: operator+()
{
return *this;
}
CFraction CFraction:: operator-()
{
CFraction x;
x.nume = -nume;
x.deno = deno;
return x;
}
bool CFraction::operator>(const CFraction &c)
{
int n, a, d;
n = nume * c.deno;
a = c.nume * deno;
d = deno * c.deno;
if (n > a && d > 0 || n < a && d < 0)
{
return true;
}
return false;
}
bool CFraction::operator<(const CFraction &c)
{
int n, a, d;
n = nume * c.deno;
a = c.nume * deno;
d = deno * c.deno;
if ((n - a) * d < 0)
{
return true;
}
else
{
return false;
}
}
bool CFraction::operator==(const CFraction &c)
{
if (*this!=c)
{
return false;
}
else
{
return true;
}
}
bool CFraction::operator!=(const CFraction &c)
{
if (*this > c || *this < c)
{
return true;
}
else
{
return false;
}
}
bool CFraction::operator>=(const CFraction &c)
{
if (*this<c)
{
return false;
}
else
{
return true;
}
}
bool CFraction::operator<=(const CFraction &c)
{
if (*this > c)
{
return false;
}
else
{
return true;
}
}
//改函数
istream &operator>>(istream &input, CFraction &d)
{
char c;
input >> d.nume;
cin >> c;
input >> d.deno;
return input;
}
ostream &operator << (ostream &output, CFraction &d)
{
char c = '/';
output << d.nume << c << d.deno;
return output;
}
int main()
{
CFraction x(1,3),y(-5,10),s;
cin >> s;
cout << x << endl << y << endl << s << endl;
system("pause");
return 0 ;
}