10.1 operator overloading ( insertion<< )

// insertion operator overloading

// normal way to display the data members of object
#include <iostream>
using namespace std;
class complex
{
private:
    int real;
    int img;
public:
    complex(int a=0 , int b=0 ){ // non parameterized constructor
        real = a;
        img = b;
    }
    void display(){
        cout<<real<<" + i"<<img<<endl;
    }
};
int main()
{
    complex c1(8,5);
    c1.display();
    return 0;
}



// now with operator<< that is insertion operator overloading

#include <iostream>
using namespace std;
class complex
{
private:
    int real;
    int img;
public:
    complex(int a=0 , int b=0 ){ // non parameterized constructor, if no value passed default it will be zero
        real = a;
        img = b;
    }
    friend ostream & operator<<(ostream &suresh , complex &c);
};

ostream & operator<<(ostream &suresh , complex &c)
{
    suresh<<c.real<<" + i"<<c.img<<endl;
}
int main()
{
    complex c(8,5);
    cout<<c; // same as operator<<(cout,c);
    return 0;
}

/*
8 + i5
*/