使用VC6.0编写运算符+、-、*、/，实现复数间的四则运算

以下是实现复数间四则运算的示例代码：

#include<iostream>
using namespace std;

class Complex
{
public:
    Complex(double r = 0, double i = 0) : real(r), imag(i) {};
    Complex operator+(const Complex& c2);
    Complex operator-(const Complex& c2);
    Complex operator*(const Complex& c2);
    Complex operator/(const Complex& c2);
    void display();
private:
    double real;
    double imag;
};

Complex Complex::operator+(const Complex& c2)
{
    return Complex(real + c2.real, imag + c2.imag);
}

Complex Complex::operator-(const Complex& c2)
{
    return Complex(real - c2.real, imag - c2.imag);
}

Complex Complex::operator*(const Complex& c2)
{
    return Complex(real*c2.real - imag*c2.imag, real*c2.imag + imag*c2.real);
}

Complex Complex::operator/(const Complex& c2)
{
    double r = c2.real*c2.real + c2.imag*c2.imag;
    return Complex((real*c2.real + imag*c2.imag) / r, (imag*c2.real - real*c2.imag) / r);
}

void Complex::display()
{
    cout << "(" << real << "," << imag << "i)" << endl;
}

int main()
{
    Complex a(1, 2), b(3, 4);
    Complex c = a + b;
    c.display();
    c = a - b;
    c.display();
    c = a * b;
    c.display();
    c = a / b;
    c.display();
    return 0;
}

在上述示例代码中，我们定义了一个复数类`Complex`，并重载了运算符`+`、`-`、`*`、`/`。在`main`函数中，我们定义了两个复数`a`和`b`，并使用重载的运算符进行四则运算，并将结果赋给变量`c`，最后输出结果。