8th Week Item 1 (1)-Implementing operator overloading in a plural class with member functions

#include <iostream>using namespace Std;class Complex{public:complex () {real=0;imag=0;}    Complex (double r,double i) {real=r; imag=i;}    Complex operator+ (const Complex &AMP;C2);    Complex operator-(const Complex &AMP;C2);    Complex operator* (const Complex &AMP;C2);    Complex operator/(const Complex &AMP;C2);    void display ();p rivate:double Real; Double imag;};/ /The following defines the member function Complex complex::operator+ (const Complex &AMP;C2) {return Complex (REAL+C2.REAL,IMAG+C2.IMAG);} Complex complex::operator-(const Complex &AMP;C2) {return Complex (REAL-C2.REAL,IMAG-C2.IMAG);} Complex complex::operator* (const Complex &AMP;C2) {return Complex (real*c2.real-imag*c2.imag,real*c2.imag+c2.real* IMAG);} Complex complex::operator/(const Complex &AMP;C2) {return Complex ((real*c2.real+imag*c2.imag)/(c2.real*c2.real+ C2.imag*c2.imag), (-REAL*C2.IMAG+C2.REAL*IMAG)/(C2.real*c2.real+c2.imag*c2.imag));} void Complex::d isplay () {if (imag>0) cout<<real<< "+" <<imag<< "I"<<endl; else cout<<real<<imag<< "I" &LT;&LT;ENDL;}    The following defines the main () function for testing int main () {Complex C1 (3,4), C2 (5,-10), C3;    cout<< "c1=";    C1.display ();    cout<< "c2=";    C2.display ();    C3=C1+C2;    cout<< "c1+c2=";    C3.display ();    C3=C1-C2;    cout<< "c1-c2=";    C3.display ();    C3=C1*C2;    cout<< "c1*c2=";    C3.display ();    C3=C1/C2;    cout<< "c1/c2=";    C3.display (); return 0;}

8th Week Item 1 (1)-Implementing operator overloading in a plural class with member functions