cpp_demo.cpp

#include <iostream>
#include <cstring>
#include <cstdlib>
#include <vector>
using namespace std;
class Str{
    public:
    char *value;
    Str(char s[])
    {
        cout<<"调用构造函数..."<<endl;
        int len = strlen(s);
        value = new char[len + 1];
        memset(value,0,len + 1);
        strcpy(value,s);
    }
    Str(Str &v)
    {
        cout<<"调用拷贝构造函数..."<<endl;
        this->value = v.value; // Just demo
    }
    ~Str()
    {
        cout<<"调用析构函数...."<<endl;
        if(value != NULL)
	{
            printf("value:%s\n", value);
            delete[] value;
	    value = NULL;
        }
    }
};

int main()
{
    char s[] = "I love BIT";
    Str *a = new Str(s);
    Str *b = new Str(*a);
    delete a;
    cout<<"b对象中的字符串为："<<b->value<<endl;
    delete b;
    return 0;
}