C++面向对象结构改进

书接上回，基于上一篇的程序改进了结构，使用了构造函数和析构函数

student.h:

#define _CRT_SECURE_NO_WARNINGS#include <cstring>
#include <iostream>using namespace std;class Student
{
private:char* m_name;int m_age;int m_score;
public:Student();Student(const char* name, int age, int score);~Student();void setName(const char* name);void setAge(int age);void setScore(int score);void show();
};Student::Student()
{m_name = NULL;m_age = 0;m_score = 0;
}Student::Student(const char* name, int age, int score)
{m_name = new char[strlen(name) + 1];  // 分配内存strcpy(m_name, name);  // 复制字符串m_age = age;m_score = score;
}void Student::setName(const char* name)
{delete[] m_name;  // 释放原来的内存m_name = new char[strlen(name) + 1];  // 分配新的内存strcpy(m_name, name);  // 复制字符串
}void Student::setAge(int age)
{m_age = age;
}void Student::setScore(int score)
{m_score = score;
}Student::~Student()
{delete[] m_name;  // 释放内存
}void Student::show()
{if (m_name == NULL){cout << "目前还没有初始化";return;}cout << "姓名：" << m_name << endl;cout << "年龄：" << m_age << endl;cout << "分数：" << m_score << endl;
}

student.cpp:

#include "student.h"int main()
{Student stu("Zzj", 19, 98);stu.show();Student STU;STU.show();return 0;
}