simple program using operator overloading (OOP) (69)

#include<iostream>

using namespace std;

class RationalNumber  //here i make a class name RationalNumber 

{

private:

int P,Q;  

public:

    RationalNumber () //here i define the default constructor 

    {

    P=0;

    Q=0;

}

RationalNumber (int a,int b) //here i define a parameterized constructor

{

P=a;

Q=b;

}

void display() //here i define a function that display the values

{

cout<<P<<"/"<<Q<<endl;

}

RationalNumber  operator +(RationalNumber  o1); //here i overload the + operator

RationalNumber  operator -(RationalNumber  o2); //here i overload the - operator

RationalNumber  operator *(RationalNumber  o3); //here i overload the * operator

RationalNumber  operator /(RationalNumber  o4); //here i overload the / operator

    friend bool operator==(RationalNumber  &p1, RationalNumber  &p2); //here i overload the == operator

    friend bool operator!=(RationalNumber  &p1, RationalNumber  &p2);//here i overload the != operator

    friend bool operator>=(RationalNumber  &p1, RationalNumber  &p2); //here i overload the >= operator

    friend bool operator<=(RationalNumber  &p1, RationalNumber  &p2);//here i overload the <= operator

};

RationalNumber  RationalNumber ::operator +(RationalNumber  o1) //here i overload the + operator

{

RationalNumber result;

result.P=P*o1.Q+o1.P*Q;

result.Q=Q*o1.Q;

return result;

}

RationalNumber  RationalNumber ::operator -(RationalNumber  o2) //here i overload the - operator

{

RationalNumber result;

result.P=P*o2.Q-o2.P*Q;

result.Q=Q*o2.Q;

return result;

}

RationalNumber RationalNumber::operator *( RationalNumber o3) //here i overload the * operator

{

RationalNumber result;

result.P=P*o3.Q;

result.P=P*o3.Q;

return result;

}

RationalNumber RationalNumber::operator /(RationalNumber o4) //here i overload the / operator

{

RationalNumber result;

result.P=P/o4.P;

result.Q=Q/o4.Q;

return result;

}

bool operator==(RationalNumber&p1, RationalNumber &p2)//here i overload the == operator

{ 

  return (p1.P==p2.P||p1.Q==p2.Q);

}

bool operator!=(RationalNumber&p1, RationalNumber &p2)//here i overload the != operator

{ 

  return (p1.P!=p2.P||p1.Q!=p2.Q);

}

bool operator>=(RationalNumber&p1, RationalNumber &p2)//here i overload the >= operator

{ 

  return (p1.P>=p2.P||p1.Q>=p2.Q);

}

bool operator<=(RationalNumber&p1, RationalNumber &p2)//here i overload the <= operator

{ 

  return (p1.P<=p2.P||p1.Q<=p2.Q);

}

int main()

{

RationalNumber p1,p2,p3;

cout<<"\t\twhen calling first object"<<endl;

p1=RationalNumber (6,7);

p1.display();

cout<<endl;

cout<<"\t\twhen calling second object"<<endl;

p2=RationalNumber (3,4);

p2.display();

cout<<endl;

p3=p1+p2;

cout<<"\t\tafter add the two RationalNumber object:"<<endl;

p3.display();

cout<<endl;

p3=p1-p2;

cout<<"\t\tafter subtract the two RationalNumber object:"<<endl;

p3.display();

cout<<endl;

p3=p1*p2;

cout<<"\t\tafter multiply the two RationalNumber object:"<<endl;

p3.display();

cout<<endl;

p3=p1/p2;

cout<<"\t\tafter divide the two RationalNumber object:"<<endl;

p3.display();

cout<<endl;

cout<<"\tafter checking the equality between two rational numbers:"<<endl;

if(p1 == p2)

    {

        cout << "Both the  are equal";

    }   

    cout<<endl;

    cout<<"\tafter checking the unequality between two rational numbers:"<<endl;

if(p1 != p2)

    {

        cout << "Both the are not equal";

    } 

    cout<<endl;

cout<<"\tafter checking this >=:"<<endl;

if(p1 >= p2)

    {

        cout<<"p1 is greater then and equal to p2"<<endl;

    }   

    cout<<endl;

    cout<<"\tafter checking this <=:"<<endl;

if(p1 <= p2)

    {

        cout <<"p2 less then and equal to p1";

    } 

}