C++语句复数运算程序

下面是一个简单的 C++ 代码示例，用于计算两个复数的加法、减法和乘法运算。

#include <iostream>
using namespace std;

struct Complex {
    double real, imag;
};

Complex add(Complex a, Complex b) {
    Complex res;
    res.real = a.real + b.real;
    res.imag = a.imag + b.imag;
    return res;
}

Complex sub(Complex a, Complex b) {
    Complex res;
    res.real = a.real - b.real;
    res.imag = a.imag - b.imag;
    return res;
}

Complex mul(Complex a, Complex b) {
    Complex res;
    res.real = a.real * b.real - a.imag * b.imag;
    res.imag = a.real * b.imag + a.imag * b.real;
    return res;
}

int main() {
    Complex a, b, res;
    char op;

    cout << "Enter the first complex number: ";
    cin >> a.real >> a.imag;
    cout << "Enter the second complex number: ";
    cin >> b.real >> b.imag;

    cout << "Enter the operation (+, -, *): ";
    cin >> op;

    switch (op) {
        case '+':
            res = add(a, b);
            cout << "The result of addition is: " << res.real << " + " << res.imag << "i" << endl;
            break;
        case '-':
            res = sub(a, b);
            cout << "The result of subtraction is: " << res.real << " + " << res.imag << "i" << endl;
            break;
        case '*':
            res = mul(a, b);
            cout << "The result of multiplication is: " << res.real << " + " << res.imag << "i" << endl;
            break;
        default:
            cout << "Invalid operation." << endl;
            break;
    }

    return 0;
}

在此代码中，我们定义了一个 `Complex` 结构体来表示复数。它包含实部和虚部两个成员变量。然后，我们定义了三个函数来执行复数的加法、减法和乘法运算。每个函数都接受两个 `Complex` 类型的参数，并返回一个 `Complex` 类型的结果。最后，我们在 `main()` 函数中读入两个复数和一个运算符，并根据运算符调用相应的函数来计算结果。