复数四则运算c语言pta

在C语言中，处理复数四则运算（加法、减法、乘法和除法）通常需要自定义数据结构来存储实部和虚部，并提供相应的函数来进行操作。以下是一个简单的例子：

首先，我们定义一个复数结构体：

typedef struct {
    double real; // 实部
    double imag; // 虚部
} Complex;

接下来，我们可以编写四个基本的复数运算函数：

// 加法
Complex add(Complex c1, Complex c2) {
    Complex result;
    result.real = c1.real + c2.real;
    result.imag = c1.imag + c2.imag;
    return result;
}

// 减法
Complex subtract(Complex c1, Complex c2) {
    Complex result;
    result.real = c1.real - c2.real;
    result.imag = c1.imag - c2.imag;
    return result;
}

// 乘法
Complex multiply(Complex c1, Complex c2) {
    Complex result;
    result.real = c1.real * c2.real - c1.imag * c2.imag;
    result.imag = c1.real * c2.imag + c1.imag * c2.real;
    return result;
}

// 分母为非零的除法
Complex divide(Complex c1, Complex c2) {
    if (c2.real != 0 && c2.imag == 0) { // 防止除以零的情况
        Complex reciprocal;
        reciprocal.real = 1 / c2.real;
        reciprocal.imag = 0;
        
        return multiply(c1, reciprocal);
    } else {
        printf("Invalid operation: Division by zero is not allowed.\n");
        return c1; // 或者返回错误处理的结果
    }
}

使用这些函数时，你可以创建复数对象并执行相应运算：

Complex num1 = {3.0, 4.0};
Complex num2 = {1.0, 2.0};

Complex sum = add(num1, num2);
Complex difference = subtract(num1, num2);
Complex product = multiply(num1, num2);
Complex quotient = divide(num1, num2); // 运行前检查是否可以除以零

printf("Sum: (%lf, %lf)\n", sum.real, sum.imag);
printf("Difference: (%lf, %lf)\n", difference.real, difference.imag);
printf("Product: (%lf, %lf)\n", product.real, product.imag);