c++智能指针学习

1.头文件:

#include<memory>

2.要领:

注意我们访问auto_ptr的成员函数时用的是“.”

3. auto prt

?c++调用getxxx()方法返回引用,是否破坏了安全性

#include <iostream>
#include <memory>
using namespace std;


class Test
{
public:
    Test(string s){
        str = s;
        cout << "test create\n";
    }

    ~Test(){
        cout << "Test delete:" << str << endl;
    }

    string& getStr(){
        return str;
    }

    void setStr(string s){
        str = s;
    }

    void print(){
        cout << str << endl;
    }

private:
    string str;
};

int main(int argc, char *argv[])
{
    auto_ptr<Test> ptest(new Test("123"));
    ptest->setStr("hello");
    ptest->print();
    ptest.get()->print();
        //return a reference is not safe
    ptest->getStr()+="world!";
    (*ptest).print();
    ptest.reset(new Test("123"));
    ptest->print();
    return 0;
}
~