STL容器值语意复杂数据类型案例

STL容器为值拷贝 并不是引用拷贝

#include 
#include 
using namespace std;

class Teacher
{
public:
	Teacher(const char* name, int age)
	{
		cout << "Teacher Construct." << endl;
		int len = strlen(name) + 1;
		p_name = new char[len];
		this->age = age;
		strcpy_s(p_name, len, name);
	}
	Teacher(const Teacher& obj)
	{
		cout << "Teacher Copy Construct." << endl;
		int len = strlen(obj.p_name) + 1;
		p_name = new char[len];
		strcpy_s(p_name, len, obj.p_name);
		this->age = obj.age;
	}
	~Teacher()
	{
		cout << "~Teacher Destruct." << endl;
		if (p_name != NULL)
		{
			delete[] p_name;
			p_name = NULL;
			age = 0;
		}
	}
public:
	Teacher& operator=(const Teacher& obj)
	{
		cout << "operator= run." << endl;
		if (p_name != NULL)
		{
			delete[] p_name;
			p_name = NULL;
			age = 0;
		}
		int len = strlen(obj.p_name) + 1;
		p_name = new char[len];
		strcpy_s(p_name, len, obj.p_name);
		this->age = obj.age;
		return *this;
	}
private:
	char* p_name;
	int age;
};

void objplay1()
{
	Teacher t1("t1", 21);
	Teacher t2 = t1;
	Teacher t3(t1);
}

void objplay2()
{
	Teacher t1("t1", 21);
	Teacher t2("t2", 22);
	Teacher t3("t3", 23);
	vector v1;
	v1.push_back(t1);
	v1.push_back(t2);
	v1.push_back(t3);
}

void objplay3()
{
	Teacher t1("t1", 21);
	vector v1;
	v1.reserve(4);
	v1.push_back(t1);
	Teacher t2("t2", 22);
	v1.push_back(t2);
}

int main()
{
	objplay3();
	system("pause");
	return 0;
}