#include <iostream>
#include <conio.h>
#include <math.h>

using namespace std;
int USCLN(int a, int b)
{
 while(a != 0 && b != 0)
 {
  if(a > b)
  a = a - b;
  else
  b = b - a;
 }
 return a + b;
}
class PHANSO
{
private:
 int tu;
 int mau;
public:
 friend ostream &operator<<(ostream &stream, PHANSO ob);
 friend istream &operator>>(istream &stream, PHANSO &ob);
 PHANSO()
 {
  this->tu = 0;
  this->mau = 1;
 }
 void ToiGian()
 {
  int usc = USCLN(abs(this->tu), abs(this->mau));
  this->tu = this->tu / usc;
  this->mau = this->mau / usc;
 }
 float DinhTri()
 {
  return (float)this->tu / (float)this->mau;
 }
 void Input()
 {
  cout<<"\nNhap Tu: ";
  cin>>this->tu;
  do
  {
  cout<<"Nhap Mau: ";
  cin>>this->mau;
  }while(this->mau == 0);
 }
 void Output()
 {
  cout<<this->tu<<"/"<<this->mau<<endl;
 }
 void operator= (PHANSO A)
 {
  this->tu = A.tu;
  this->mau = A.mau;
 }
 PHANSO operator+ (PHANSO A)
 {
  PHANSO C;
  C.tu = this->tu * A.mau + this->mau * A.tu;
  C.mau = this->mau * A.mau;
  return C;
 }
 void operator+= (PHANSO A)
 {
  this->tu = this->tu * A.mau + this->mau * A.tu;
  this->mau = this->mau * A.mau;
 }
 PHANSO operator- (PHANSO A)
 {
  PHANSO C;
  C.tu = this->tu * A.mau - this->mau * A.tu;
  C.mau = this->mau * A.mau;
  return C;
 }
 void operator-= (PHANSO A)
 {
  this->tu = this->tu * A.mau - this->mau * A.tu;
  this->mau = this->mau * A.mau;
 }
 PHANSO operator* (PHANSO A)
 {
  PHANSO C;
  C.tu = this->tu * A.tu;
  C.mau = this->mau * A.mau;
  return C;
 }
 void operator*= (PHANSO A)
 {
  this->tu = this->tu * A.tu;
  this->mau = this->mau * A.mau;
 }
 PHANSO operator/ (PHANSO A)
 {
  PHANSO C;
  C.tu = this->tu * A.mau;
  C.mau = this->mau * A.tu;
  return C;
 }
 void operator/= (PHANSO A)
 {
  this->tu = this->tu * A.mau;
  this->mau = this->mau * A.tu;
 }
 bool operator== (PHANSO A)
 {
  if(this->tu * A.mau == this->mau * A.tu)
  return true;
  return false;
 }
 bool operator!= (PHANSO A)
 {
  if(this->tu * A.mau != this->mau * A.tu)
  return true;
  return false;
 }
 bool operator> (PHANSO A)
 {
  if(this->tu * A.mau > this->mau * A.tu)
  return true;
  return false;
 }
 bool operator< (PHANSO A)
 {
  if(this->tu * A.mau < this->mau * A.tu)
  return true;
  return false;
 }
 bool operator>= (PHANSO A)
 {
  if(this->tu * A.mau >= this->mau * A.tu)
  return true;
  return false;
 }
 bool operator<= (PHANSO A)
 {
  if(this->tu * A.mau <= this->mau * A.tu)
  return true;
  return false;
 }
};
ostream &operator<<(ostream &stream, PHANSO PS)
{
 stream << PS.tu << "/" << PS.mau;
 return stream;
}
istream &operator>>(istream &stream, PHANSO &PS)
{
  cout << "\nNhap Tu: ";
  stream >> PS.tu;
  do
  {
  cout << "Nhap Mau: ";
  stream >> PS.mau;
  }while(PS.mau == 0);
  return stream;
}

int main()
{
 cout<<"-----BAI TAP CAI DAT LOP PHAN SO VA CAS PHEP TOAN CO BAN-------\n\n";
 cout<<"\n----------------Programming By Edward_Thien -------------------\n\n\n";
 //Cac Khai Bao Doi Tuong
 PHANSO A, B, C, D, E;
 PHANSO TONG, HIEU, TICH, THUONG;
 //Cac Phuong Thuc In, Out
 cout<<"\n--- Cac Phuong Thuc In, Out ---\n";
 cout<<"\nNhap Phan So A: ";
 A.Input();
 A.Output();
 cout<<"\nNhap Phan So B: ";
 B.Input();
 B.Output();
 //Phuong Thuc Gan
 cout<<"\n------- Phuong Thuc Gan C = A ----------\n";
 C = A;
 cout<<"\nC = A = ";
 C.Output();
 //Phuong Thuc Dinh Tri
 cout<<"\n-------- Phuong Thuc Dinh Tri ------------\n";
 cout<<"\nPhan So C Co Gia Tri = "<<C.DinhTri();
 //Cac Phep Toan So Sanh
 cout<<"\n-------- Cac Phep Toan So Sanh ------------\n";
 if(A > B)
  cout<<"\nPhan So A > Phan So B\n";
 else if(A < B)
  cout<<"\nPhan So A < Phan So B\n";
 else if(A == B)
  cout<<"\nPhan So A == Phan So B\n";
 //Cac Phep Toan Co Ban 2 Ngoi
 cout<<"\n---------- Cac Phep Toan Co Ban 2 Ngoi ----------\n";
 TONG = A + B;
 TONG.ToiGian();
 cout<<"\nTONG = A + B = ";
 TONG.Output();
 HIEU = A + B;
 HIEU.ToiGian();
 cout<<"\nHIEU = A - B = ";
 HIEU.Output();
 TICH = A * B;
 TICH.ToiGian();
 cout<<"\nTICH = A * B = ";
 TICH.Output();
 THUONG = A / B;
 THUONG.ToiGian();
 cout<<"\nTHUONG = A / B = ";
 THUONG.Output();
 //Cac Phep Toan Phuc Hop
 cout<<"\n-------- Cac Phep Toan Phuc Hop ----------\n";
 TONG += A;
 TONG.ToiGian();
 cout<<"\nTONG += A = ";
 TONG.Output();
 HIEU -= A;
 HIEU.ToiGian();
 cout<<"\nHIEU -= A = ";
 HIEU.Output();
 TICH *= A;
 TICH.ToiGian();
 cout<<"\nTICH *= A = ";
 TICH.Output();
 THUONG /= A;
 THUONG.ToiGian();
 cout<<"\nTHUONG /= A = ";
 THUONG.Output();
 //Overload Toan Tu >> & <<
 cout<<"\n------- Overload Toan Tu >> & << --------\n";
 cout<<"\nNhap Phan So D: ";
 cin>>D;
 cout<<D;
 cout<<"\nNhap Phan So E: ";
 cin>>E;
 cout<<E;
 cout<<"\n\n------------------------------KET THUC----------------------------------\n\n";
 _getch();
 return 0;
}

friend ostream &operator<<(ostream &stream, PHANSO ob);
 friend istream &operator>>(istream &stream, PHANSO &ob);