代码

#include <iostream>

using namespace std;
class cz
{
private:
    int num1;   //实部
    int num2;   //虚部
public:
    cz(){}
    cz(int a,int b):num1(a),num2(b){}
    cz(const cz &other):num1(other.num1),num2(other.num2){}
    ~cz(){}
    const cz operator+(const cz &other)const
    {
        cz a;
        a.num1=this->num1+other.num1;
        a.num2=this->num2+other.num2;
        return a;
    }
    bool operator==(const cz &other)const
    {
       if(this->num1==other.num1&&this->num2==other.num2)
       {
           return true;
       }
       else
       {
           return false;
       }
    }
    cz & operator+=(const cz &other)
    {
        this->num1+=other.num1;
        this->num2+=other.num2;
        return *this;
    }
    cz & operator ++()
    {
        this->num1++;
        return *this;
    }
    const cz operator-(const cz &other)const
    {
        cz a;
        a.num1=this->num1-other.num1;
        a.num2=this->num2-other.num2;
        return a;
    }
    void show()
    {
        if(num2<0)
        {
            cout<<this->num1<<this->num2<<"j"<<endl;
        }else
        {
            cout<<num1<<"+"<<num2<<"j"<<endl;
        }
    }
};
int main()
{
    cz a1(1,-1);
    a1.show();
    cz a2(1,2);
    a2.show();
    a1+=a2;
    a1.show();
    a1=a1+a2;
    a1.show();
    a1=a1-a2;
    a1.show();
    ++a1;
    a1.show();
    return 0;
}

效果图