复制深体验2

#include <iostream>
#include<cstring>

using namespace std;
class A
{
private:
    char *a;
public:
    A(char *aa)
    {
       a= new char[strlen(aa)+1];
        strcpy(a,aa);
    }
    A( const A &obj)
    {

       a= new char[strlen(obj.a)+1];
        strcpy(a,obj.a);
    }
    ~A()
    {
        delete []a;
    }
    void output(){cout<<a<<endl;}
};

int main()
{
    A a("good moring, code monkeys!");
    a.output();
    A b(a);
    b.output();
    return 0;
}