#include<iostream> using namespace std; //你提交的代码在这里 int main() { Complex c1; cout<<"Show object c1:"<<c1<<endl; double re,im; cin>>re>>im; Complex c2(re,im); cout<<"Show object c2:"<<c2<<endl; cin>>re>>im; c1.Set(re,im); cout<<"Reset and Show object c1:"<<c1<<endl; Complex c3; c3=c1+c2; cout<<c1<<" + "<<c2<<" = "<<c3<<endl; c3=c1-c2; cout<<c1<<" - "<<c2<<" = "<<c3<<endl; c3=c1*c2; cout<<c1<<" * "<<c2<<" = "<<c3<<endl; return 0; }输入2 2 1 -1输出Show object c1:0 Show object c2:2+2i Reset and Show object c1:1-i 1-i + 2+2i = 3+i 1-i - 2+2i = -1-3i 1-i * 2+2i = 4复数的输出说明： （1）虚部为0：直接输出实部，例如：0，5 （2）实部为0：直接输出虚部，例如：-2i （3）实部和虚部都不是0：输出形式：实部+虚部i，如果虚部为负数，则忽略+号 例如：5+2i，5-2i （4）如果虚部绝对值为1的，1可以省略。例如：3+i，3-i，i，-i等请补充完整代码

好的，以下是完整的代码：

#include<iostream> 
using namespace std; 

class Complex { 
private: 
    double real;   // 实部
    double imag;   // 虚部
public: 
    Complex() : real(0), imag(0) {} 
    Complex(double r, double i) : real(r), imag(i) {} 

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

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

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

    void Set(double r, double i) { 
        real = r; 
        imag = i; 
    } 

    friend ostream& operator<<(ostream& os, const Complex& c) { 
        if (c.real == 0 && c.imag == 0) { 
            os << "0"; 
        } else if (c.real == 0) { 
            os << c.imag << "i"; 
        } else if (c.imag == 0) { 
            os << c.real; 
        } else { 
            os << c.real; 
            if (c.imag > 0) { 
                os << "+"; 
            } 
            if (c.imag == 1) { 
                os << "i"; 
            } else if (c.imag == -1) { 
                os << "-i"; 
            } else { 
                os << c.imag << "i"; 
            } 
        } 
        return os; 
    } 
}; 

int main() { 
    Complex c1; 
    cout << "Show object c1:" << c1 << endl; 

    double re, im; 
    cin >> re >> im; 
    Complex c2(re, im); 
    cout << "Show object c2:" << c2 << endl; 

    cin >> re >> im; 
    c1.Set(re, im); 
    cout << "Reset and Show object c1:" << c1 << endl; 

    Complex c3; 
    c3 = c1 + c2; 
    cout << c1 << " + " << c2 << " = " << c3 << endl; 

    c3 = c1 - c2; 
    cout << c1 << " - " << c2 << " = " << c3 << endl; 

    c3 = c1 * c2; 
    cout << c1 << " * " << c2 << " = " << c3 << endl; 

    return 0; 
}

这个程序定义了一个名为Complex的类，实现了复数的加减乘运算。在主函数中，首先创建了一个默认的复数对象c1，并输出其值。接着通过用户输入的方式，创建了一个新的复数对象c2，并输出其值。再次通过用户输入的方式，重置了c1的值，并输出其值。然后定义了一个新的复数对象c3，通过运算符重载实现了c1与c2的加减乘运算，并输出运算结果。需要注意的是，复数的输出格式需要按照一定规则进行格式化，具体规则已在代码中给出。