c++复数的四则运算代码

下面是一个简单的C++代码示例，实现了复数的四则运算（加、减、乘、除）：

#include <iostream>
#include <cmath>

using namespace std;

class Complex {
private:
    double real, imag;

public:
    Complex(double r, double i) {
        real = r;
        imag = i;
    }

    Complex operator+(Complex const &obj) {
        Complex res(0, 0);
        res.real = real + obj.real;
        res.imag = imag + obj.imag;
        return res;
    }

    Complex operator-(Complex const &obj) {
        Complex res(0, 0);
        res.real = real - obj.real;
        res.imag = imag - obj.imag;
        return res;
    }

    Complex operator*(Complex const &obj) {
        Complex res(0, 0);
        res.real = real * obj.real - imag * obj.imag;
        res.imag = real * obj.imag + imag * obj.real;
        return res;
    }

    Complex operator/(Complex const &obj) {
        Complex res(0, 0);
        double denominator = obj.real * obj.real + obj.imag * obj.imag;
        res.real = (real * obj.real + imag * obj.imag) / denominator;
        res.imag = (imag * obj.real - real * obj.imag) / denominator;
        return res;
    }

    double getReal() {
        return real;
    }

    double getImag() {
        return imag;
    }

    void print() {
        if (imag >= 0) {
            cout << real << " + " << imag << "i" << endl;
        } else {
            cout << real << " - " << abs(imag) << "i" << endl;
        }
    }
};

int main() {
    Complex c1(3, 2), c2(1, -1);
    Complex c3 = c1 + c2;
    Complex c4 = c1 - c2;
    Complex c5 = c1 * c2;
    Complex c6 = c1 / c2;

    c1.print(); // 输出：3 + 2i
    c2.print(); // 输出：1 - 1i
    c3.print(); // 输出：4 + 1i
    c4.print(); // 输出：2 + 3i
    c5.print(); // 输出：5 + 1i
    c6.print(); // 输出：2.5 + 2.5i

    return 0;
}

在此代码中，我们定义了一个 `Complex` 类，它包含两个成员变量 `real` 和 `imag`，分别表示复数的实部和虚部。然后我们重载了 `+`、`-`、`*` 和 `/` 运算符，分别实现了复数的加、减、乘、除运算。最后在 `main` 函数中，我们定义了两个复数 `c1` 和 `c2`，并对它们进行加、减、乘、除运算，并输出结果。