#include <iostream>

using namespace std;
struct complex{
           int real ;
           int imag ;
           } complex1, complex2, temp ;

void swap_complex (complex*, complex* ) ;
int main()
{
    cout << "Enter real and imaginary part of a complex number :" ;
    cin >> complex1.real >> complex1.imag ;

    cout << "\nEnter real and imaginary part of another complex number :" ;
    cin >> complex2.real >> complex2.imag ;

    cout << "\n\n--------Before Swapping---------"<<endl;
    cout << "\nFirst complex number : "<<complex1.real<<"+"<<(complex1.imag)<<"i" ;
    cout << "\nSecond complex number : "<<complex2.real<<"+"<<(complex2.imag)<<"i" ;

    swap_complex(&complex1, &complex2);

    cout << "\n\n--------After Swapping---------"<<endl;
    cout << "\nFirst complex number : "<<complex1.real<<"+"<<(complex1.imag)<<"i" ;
    cout << "\nSecond complex number : "<<complex2.real<<"+"<<(complex2.imag)<<"i\n\n" ;
    return 0;
}

void swap_complex (complex* a, complex* b )
{
    temp.real = (*a).real;   //for Pointer : using ' (*a) ' is equivalent to ' -> ' . Either of them can be used for pointing operation
    temp.imag = (*a).imag ;

    (*a).real = (*b).real ;
    (*a).imag = (*b).imag ;

    (*b).real = temp.real;
    (*b).imag = temp.imag ;
}