Insertion Overload Example in C++

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This code defines a class Complex which represents a complex number with a real and an imaginary part. The class has a constructor, which initializes the real and imaginary parts of the complex number, and a friend function operator<< which overloads the << operator to allow us to print complex numbers.

The operator<< function takes an output stream o and a complex number c1 as input, and returns the output stream o after printing the complex number in the format real+imaginaryi.

In the main function, a complex number c1 is initialized with real and imaginary values. Then, the operator<< is used to print c1 using the cout object. The same thing is achieved using the operator<< function explicitly by calling operator<<(cout,c1).

Source Code

#include<iostream>
using namespace std;
class Complex
{
public :
    int real;
    int img;
    friend ostream & operator << (ostream &o,Complex &c1);
};
ostream & operator << (ostream &o,Complex &c1)
{
    o<<c1.real<<"+i"<<c1.img;
    return o;
}
int main()
{
    Complex c1;
    c1.real=5;
    c1.img=3;
    cout<<c1;
    operator<<(cout,c1);
    return 0;
}

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Output

5+i35+i3

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