C++中对象的定义与使用 三种方法及区别

C++

文件 Employee.h

#include 
#include 
using namespace std;
class Employee {
public:
    int age;
    //C++ 字符串
    //1 字符数组  char name[20]; #include  strcpy函数
    //2 字符串  string  #include 

    string name;
    char address;
public:
    void sayHello();
};

Employee.cpp

#include 
#include 
#include "Employee.h"
using namespace std;

void Employee::sayHello() {
    cout << "I love you ,chaochao" << endl;
}

TestEmployee.cpp

#include "Employee.h"
#include 
#include 
using namespace std;
//第一种
int main() {
    Employee zhenglin;
    zhenglin.age = 19;
    zhenglin.name = "zhenglin";
    zhenglin.sayHello();
    return 0;
}
int main_01() {
    //第二种
    Employee *e1 = new Employee();
    Employee *e2;
    e2 = new Employee();
    e1->age = 20;
    e1->name = "yuxia";
    e1->sayHello();
    //第三种
    Employee emp;
    Employee *e3 = &emp;
    e3->age = 21;
    e3->name = "liyi";
    e2->sayHello();
    delete e1;
    return 0;
}

有new的都需要用delete清除内存