深复制体验

#include<iostream>
#include<cstring>
using namespace std;
class A
{
private:
    char *a;
public:
    A(char *aa)
    {
        a = new char[strlen(aa)+1];  //（1）这样处理的意义在于：______________________________
        strcpy(a,aa);  //（2）数据成员a与形式参数aa的关系：___________________________________
    }
    ~A()
    {
        delete []a;   //（3）这样处理的意义在于：  ___________________________________________
    }
    void output()
    {
        cout<<a<<endl;
    }
};
int main(){
    A a("good morning, code monkeys!");
    a.output();
    A b("good afternoon, codes!");
    b.output();
    return 0;
}