31-完善的复数类

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Complex.h#ifndef _COMPLEX_H_#define _COMPLEX_H_class Complex{    double a;    double b;public:    Complex(double a = 0, double b = 0);    double getA();    double getB();    double getModulus();    Complex operator + (const Complex& c);    Complex operator - (const Complex& c);    Complex operator * (const Complex& c);    Complex operator / (const Complex& c);    bool operator == (const Complex& c);    bool operator != (const Complex& c);    Complex& operator = (const Complex& c);};#endif

Complex.cpp#include "Complex.h"#include "math.h"Complex::Complex(double a, double b){    this->a = a;    this->b = b;}double Complex::getA(){    return a;}double Complex::getB(){    return b;}double Complex::getModulus(){    return sqrt(a * a + b * b);}Complex Complex::operator + (const Complex& c){    double na = a + c.a;    double nb = b + c.b;    Complex ret(na, nb);    return ret;}Complex Complex::operator - (const Complex& c){    double na = a - c.a;    double nb = b - c.b;    Complex ret(na, nb);    return ret;}Complex Complex::operator * (const Complex& c){    double na = a * c.a - b * c.b;    double nb = a * c.b + b * c.a;    Complex ret(na, nb);    return ret;}Complex Complex::operator / (const Complex& c){    double cm = c.a * c.a + c.b * c.b;    double na = (a * c.a + b * c.b) / cm;    double nb = (b * c.a - a * c.b) / cm;    Complex ret(na, nb);    return ret;}bool Complex::operator == (const Complex& c){    return (a == c.a) && (b == c.b);}bool Complex::operator != (const Complex& c){    return !(*this == c);}Complex& Complex::operator = (const Complex& c){    if( this != &c )//判断当前两个对象是不是同一个对象    {        a = c.a;        b = c.b;    }    return *this;//返回当前对象的引用，为了实现连续的赋值操作}

#include <stdio.h>#include "Complex.h"int main(){    Complex c1(1, 2);    Complex c2(3, 6);    Complex c3 = c2 - c1;    Complex c4 = c1 * c3;    Complex c5 = c2 / c1;    printf("c3.a = %f, c3.b = %f\n", c3.getA(), c3.getB());    printf("c4.a = %f, c4.b = %f\n", c4.getA(), c4.getB());    printf("c5.a = %f, c5.b = %f\n", c5.getA(), c5.getB());    Complex c6(2, 4);    printf("c3 == c6 : %d\n", c3 == c6);    printf("c3 != c4 : %d\n", c3 != c4);    (c3 = c2) = c1;    printf("c1.a = %f, c1.b = %f\n", c1.getA(), c1.getB());    printf("c2.a = %f, c2.b = %f\n", c2.getA(), c2.getB());    printf("c3.a = %f, c3.b = %f\n", c3.getA(), c3.getB());    return 0;}