C++ 成员初始化列表和new运算符的应用

输出一个学生的学号，姓名，性别和出生年月日

class Date
{
public:
	Date(int y, int m, int d) :m_year(y), m_month(m), m_day(d) {}
	void Print()
	{
		cout << m_year << "/" << m_month << "/" << m_day << endl;
	}

private:
	int m_year;
	int m_month;
	int m_day;
};
class student
{
public:
	student(int num, const char* name, char sex, int y, int m, int d) :m_num(num), m_sex(sex), birthday(y, m, d)
	//因为m_name是指针类型的数据成员，所以不可以在成员初始化列表中直接初始化。
	//因为birthday是Date类的对象，Date类构造函数是有参数的构造函数，需要进行传参，所以m_year、m_month、m_day在student的初始化需要直接调用birthday将y，m，d给它传过去
	{
		m_name = new char[strlen(name) + 1];
		strcpy_s(m_name, strlen(name) + 1, name);
	}
	~student()
	{
		if (m_name != NULL)
		{
			delete[]m_name;
			m_name = NULL;
		}

	}
	void Show()
	{
		cout << m_num << " " << m_name << " " << m_sex << " ";
		birthday.Print();//调用接口去输出年月日的值
	}
private:
	int m_num;
	char* m_name;
	char m_sex;
	Date birthday;
};
void main()
{
	student s1(1001, "lisi", 'm', 2000, 12, 12);
	s1.Show();
}

运行结果：