构造函数和析构函数

#include 
#include 

using namespace std;

class Student {
private:
	int number;
	char* name;
	int age;
	float score;
public:
	Student();//默认构造函数
	Student(int no, const char* n, int a, float s);//带参构造函数
	Student(Student& s);//拷贝构造函数
	~Student();//析构函数
	
	void show();
};

Student::Student() {//默认构造函数
	number = 0;
	name = NULL;
	age = 0;
	score = 0;
}

Student::Student(int no, const char* n, int a, float s) {//带参构造函数
	number = no;
	name = new char[strlen(n) + 1];
	strcpy_s(name, strlen(n) + 1, n);
	age = a;
	score = s;
}

Student::Student(Student& s) {//拷贝构造函数
	number = s.number;
	name = new char[strlen(s.name) + 1];
	name = s.name;
	age = s.age;
	score = s.score;
}

Student::~Student() {//析构函数
	
	if (name != NULL) {
		cout << name << "同学分解掉" << endl;
	}
	else {
		cout << "有一个同学即将退出" << endl;
	}
}

void Student::show() {
	if (name != NULL) {
		cout << "学号:" << number << "t";
		cout << "姓名:" << name << "t";
		cout << "年龄:" << age << "t";
		cout << "成绩:" << score << endl;
	}
}

int main(void) {
	
	Student zhangsan(1, "张三", 20, 97);
	Student lisi(2, "李四", 21, 100);
	zhangsan.show();
	lisi.show();

	Student anonymous(zhangsan);
	anonymous.show();

	return 0;
}