C++保存在栈和堆上的对象

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

class Student
{
private:
	string _name;
public:
	void set(string name){this->_name=name;}
	string get(){return this->_name;}
};

int main()
{
	//保存在栈中的对象
	Student stu1;
	stu1.set("zhang1");
	cout<<"学生姓名:"<<stu1.get()<<endl;

	//保存在堆中的对象
	Student *stu2 = new Student(); //new创建的对象保存在堆中，并返回指针
	(*stu2).set("zhang2");
	cout<<"对象指针:"<<stu2<<endl;
	cout<<"学生姓名:"<<(*stu2).get()<<endl;
	stu2->set("zhang3"); //另一种对象访问方式：成员指针运算符
	cout<<"学生姓名:"<<stu2->get()<<endl;
	delete stu2; //删除对象，很重要
	stu2=0; //空指针，很重要


	return 0;
}

int main()
{
	//保存在堆中的对象
	Student *stu1;
	stu1 = new Student();	
	stu1->set("zhang1");
	stu1 = new Student();//zhang1占的内存再不能释放和使用	
	stu1->set("zhang2");
	delete stu1;
	stu1=0;

	return 0;
}

int main()
{
    //保存在堆中的对象
    Student *stu1 = new Student();    
    stu1->set("zhang1");
    delete stu1;//只删除，不置空
	cout<<"指针stu1地址："<<stu1<<endl;
    Student *stu2 = new Student();    
    stu2->set("zhang2");
    cout<<"指针stu1地址："<<stu1<<endl;
    cout<<"指针stu2地址："<<stu2<<endl;
    stu1->set("zhang3");
    cout<<"学生姓名："<<stu2->get()<<endl;
	
    return 0;
}