Комплексные числа. Реализовать класс и математические операции

#include "stdafx.h"
#include <iostream>
using namespace std;
 
class complex
{
private:
    double m_a;
    double m_b;
    
public:
    complex();
    complex (double a, double b);
    void print();
};
 
complex::complex()
{
    m_a = 0.0;
    m_b = 0.0;
}
 
complex::complex (double a, double b)
{
    m_a = a;
    m_b = b;
}
 
void complex::print()
{
    cout << m_a << "+i" << m_b << endl;
}
 
int _tmain()
{
    complex a, b;
    cout<<"a= \n";
    cout<<"b= \n";
        
    complex *c = new complex(10, 20);
    c->print();
    return 0;

complex & operator +(complex x1, commplex x2)
{
body
}

class
{
 
complex & operator +(complex x)
{
body with m_a, m_b
}

operator +

copmlex plus(complex x1, complex x2)
{ complex tmp(x1.m_a,x1.m_b);
tmp.m_a+=x2.ma;
tmp.m_b+=x2.m_b;
return tmp;

using namespace std;
 
class complex
{
private:
    double m_a;
    double m_b;
    
public:
    complex();
    complex (double a, double b);
 
    complex &operator+ (const complex&);
    complex &operator- (const complex&);
    complex &operator* (const complex&);
 
    void print();
};
 
complex::complex()
{
    m_a = 0.0;
    m_b = 0.0;
}
 
complex::complex (double a, double b)
{
    m_a = a;
    m_b = b;
}
 
// Функции +, -, * соответственно: 
 
complex &complex :: operator+ (const complex &source)
{
    complex newComplex(this->m_a + source.m_a, this->m_b + source.m_b);
    return newComplex;
}
complex &complex :: operator- (const complex &source)
{
    complex newComplex(this->m_a - source.m_a, this->m_b - source.m_b);
    return newComplex;
}
complex &complex :: operator* (const complex &source)
{
    complex newComplex(this->m_a * source.m_a - this->m_b * source.m_b, this->m_a * source.m_b + this->m_b * source.m_a); // вычисление (a+bi)(c+di) = a*c-b*d + (a*d+b*c)i
    return newComplex;
}
 
void complex::print()
{
    cout << m_a << "+i" << m_b << endl;
}

main()
{
complex a(1,1),b(2,2),c;
c=a+b;
c.print();
}