Program to perform arithmetic operations on complex numbers using operator overloading

#include<stdio.h> #include<conio.h> #include<iostream.h> //Considering normal case in which I considered real and imagenary both part are positive class complex { int real,img; public: void get() { cout<<endl<<"Enter real part of the number : "; cin>>real; cout<<"Enter imagenary part of the number : "; cin>>img; } complex operator + (complex); complex operator - (complex); complex operator * (complex); void display() { cout<<real<<"+i"<<img; } }; complex complex::operator + (complex n) { complex temp; temp.real=real+n.real; temp.img=img+n.img; cout<<endl<<"Addition of : "; display(); cout<<" and "; n.display(); cout<<" is : "; temp.display(); return temp; } complex complex::operator - (complex n) { complex temp; temp.real=real-n.real; temp.img=img-n.img; cout<<endl<<"Difference of : "; display(); cout<<" and "; n.display(); cout<<" is : "; temp.display(); return temp; } complex complex::operator * (complex n) { complex temp; temp.real=(real*n.real)-(img*n.img); temp.img=(real*n.img)+(img*n.real); cout<<endl<<"Product of : "; display(); cout<<" and "; n.display(); cout<<" is : "; temp.display(); return temp; } void main() { clrscr(); int choice; complex n1,n2; n1.get(); n2.get(); complex n3; clrscr(); cout<<endl<<"Press 1. for Addition"; cout<<endl<<"Press 2. for Subtraction"; cout<<endl<<"Press 3. for Multiplication"; cout<<endl<<"Enter your choice : "; cin>>choice; switch(choice) { case 1: n3=n1+n2; break; case 2: n3=n1-n2; break; case 4: n3=n1*n2; break; default: cout<<endl<<"Wrong choice"<<endl<<"Redirecting to main function."; getch(); main(); } getch(); }