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#include <iostream>
#include <fstream>
using namespace std;
class Rational
{
friend bool operator==(const Rational& p, const Rational& q);
friend Rational operator+(const Rational& p, const Rational& q);
friend Rational operator*(const Rational& p, const Rational& q);
friend Rational operator-(const Rational& p, const Rational& q);
friend bool operator<(const Rational& p, const Rational& q);
friend bool operator>(const Rational& p, const Rational& q);
friend ostream& operator<<(ostream& os, const Rational& p);
friend istream& operator>>(istream& is, Rational& p);
private:
int x;
int y;
public:
Rational();
Rational(int xx, int yy);
Rational(int xxx);
};
Rational::Rational()
{
x=0;
y=1;
}
Rational::Rational(int xx, int yy)
{
if(yy==0)
{
exit(1);
yy=1;
}
else
{ x=xx;
y=yy;
}
}
Rational::Rational(int xxx)
{
int h=1;
y=h;
x=xxx;
}
bool operator==(const Rational& p, const Rational& q)
{
if((p.x/p.y)==(q.x/q.y))
return true;
else
return false;
}
Rational operator+(const Rational& p, const Rational& q)
{
Rational z(((p.x*q.y)+(p.y*q.x)), (p.y*q.y));
return z;
}
Rational operator*(const Rational& p, const Rational& q)
{
Rational z(p.x*q.x, p.y*q.y);
return z;
}
Rational operator-(const Rational& p, const Rational& q)
{
Rational z(((p.x*q.y)-(p.y*q.x)), (p.y*q.y));
return z;
}
bool operator<(const Rational& p, const Rational& q)
{
if((p.x/p.y)<(q.x/q.y))
return true;
else
return false;
}
bool operator>(const Rational& p, const Rational& q)
{
if((p.x/p.y)>(q.x/q.y))
return true;
else
return false;
}
ostream& operator<<(ostream& os, const Rational& p)
{
os<<p.x<<"/"<<p.y<<endl;
return os;
}
istream& operator>>(istream& is, Rational& p)
{
bool to_check;
is>>p.x>>p.y;
if(p.y==0)
{
to_check = false;
exit(1);
}
return is;
}
int main()
{
Rational x; //this will call default constructor to initialize x to 0/1
Rational y(3); //this should initialize y to 3/1
Rational z(2, 3); //this will be a rational number 2/3
Rational k, v;
cout<<x; //it prints rational number in the form numerator/denominator
cout<<y;
cout<<z;
if(x<y) cout<<"x is smaller than y\n";
else if(x==y) cout<<"x is equal to y\n";
else if(x>y) cout<<"x is greater than y\n";
Rational a = y+z;
cout<<"y+z="<<a;
Rational b = y-z;
cout<<"y-z="<<b;
Rational c = y*z;
cout<<"y*z="<<c;
cout<<"Enter a rational number:";
cin>>x;
cout<<"You entered "<<x;
ifstream ifs;
ifs.open("inputfile.txt");
ifs>>k>>v;
ifs.close();
ofstream ofs;
ofs.open("output.txt");
ofs<<"K= "<<k<<"V= "<<v<<"K+V= "<<k+v<<"K-V= "<<k-v<<"K*V= "<<k*v;
system("pause");
return 0;
}
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