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/* ***************QUESTION*****************/

#include<iostream>
using namespace std;
class complex
{
     int real,img;
public:
   
    complex()   // default constructor
    {
    real=0;
    img=0;
    }
    complex operator +(complex); // declaration for addition
    complex operator *(complex); // declaration for multiplication
    friend ostream &operator<<(ostream&,complex&);  //output function
    friend istream &operator>>(istream&,complex&);  // input function
};
complex complex::operator +(complex obj)   
{
    complex temp;
    temp.real=real+obj.real;
    temp.img=img+obj.img;
    return (temp);
}

complex complex::operator *(complex obj)
{
    complex res;
    res.real=(real*obj.real)-(img*obj.img);
    res.img=(real*obj.img)+(img*obj.real);
    return (res);
}

istream &operator>>(istream & inp,complex& obj)  //defining (extraction)>> operator

     //accepting real part with object of istream class
      //accepting imaginary part with object of istream class
{    
    inp>>obj.real;
    while(!(inp>>obj.real)){
        cout<<"ENTER A NUMBER";
        inp.clear();
        inp.ignore('\n');

    }
    inp>>obj.img;
    while(!(inp>>obj.img)){
        cout<<"ENTER A NUMBER";
        inp.clear();
        inp.ignore('\n');

    }
    
    return inp;

}

ostream &operator<<(ostream& out,complex& obj) //defining <<(insertion) operator
{
    char ch;
    out<<obj.real;   //displaying real part with object of ostream class
   if (obj.img<0){
        ch='-';
    }
    else{
        ch='+';
    }
    out<<ch<<abs(obj.img)<<"i"; //displaying imaginary part with object of ostream class
    return out;
}

int main()
{
    complex c1,c2,c3,c4;
    //Enter first complex number";
    cout<<"\n Enter real and imaginary part of first complex number:";
    cin>>c1;

    // Enter second complex number";
    cout<<"\n Enter real and imaginary part of second complex number:";
    cin>>c2;

    cout<<"\nArithmetic operations are :";
    c3=c1+c2;
    cout<<"\n Addition is:"<<c3;
   
    c4=c1*c2;
    cout<<"\n Multiplication is:"<<c4<<"\n";
    return 0;
}