C++（笔记）类实例

来源：互联网发布：拖延心理学知乎编辑：程序博客网时间：2024/05/22 03:25
//定义一个Person类，成员变量age(年龄),和name(姓名),成员函数getName(),getAge(),setAge(int newAge),完成该类测试#include <iostream>#include "Person.h"using namespace std;int main(){    Person p;    p.getName();    p.setAge(14);    p.getAge();return 0;}/*class Person  {public:    void getAge();    void getName();    void setAge(int newAge);    Person();    virtual ~Person();private:    int age;    char name;};*//*Person::Person(){}Person::~Person(){}void Person::setAge(int newAge){    age=newAge; }void Person::getName(){     name='x';     cout<<name<<endl;}void Person::getAge(){    cout<<age<<endl;}*///x//14//给该类添加复制构造函数（已包括构造函数无参和实参），并测试#include <iostream>using namespace std;class Person{    public:        void setAge(int newAge);        void getAge();        void getName();        Person(int a,char n){            age=a;            name=n;        }        Person(Person &p);        int geta(){return age;}        char getn(){return name;}    private:        int age;        char name;      };Person::Person(Person &p){    age=p.age;    name=p.name;    cout<<"copy"<<endl;}void Person::setAge(int newAge){    age=newAge;}void Person::getAge(){    cout<<age<<endl;}void Person::getName(){    cout<<name<<endl;}int main(){    Person p(14,'s');    Person b(p);    cout<<b.geta()<<endl;    cout<<b.getn()<<endl;    return 0;}//copy//14//s//利用容器类vector定义一个存放Person的可变成数组，往数组中添加3个Person对象，设置对象的age后输出#include <iostream>#include <vector>using namespace std;class Person{    public:        void setAge(int newAge);        void getAge();        void getName();        Person(int a,char n){            age=a;            name=n;        }        Person(Person &p);        int geta(){return age;}        char getn(){return name;}    private:        int age;        char name;      };Person::Person(Person &p){    age=p.age;    name=p.name;    cout<<"copy"<<endl;}void Person::setAge(int newAge){    age=newAge;}void Person::getAge(){    cout<<age<<endl;}void Person::getName(){    cout<<name<<endl;}int main(){    int i=0;    vector <int>h;    Person p(14,'s');    Person b(p);    h.resize(3);    h[0]=b.geta();    Person t(15,'g');    Person r(t);    h[1]=r.geta();    Person s(16,'q');    Person w(s);    h[2]=w.geta();    for(i=0;i<3;i++)    {        cout<<h[i]<<endl;    }    return 0;}//copy//copy//copy//14//15//16//用new生成Person对象#include <iostream>using namespace std;class Person{    public:        void setAge(int newAge);        void getAge();        void getName();        Person(int a,char n){            age=a;            name=n;        }        Person();        Person(Person &p);        int geta(){return age;}        char getn(){return name;}//  private:        int age;        char name;      };Person::Person(Person &p){    age=p.age;    name=p.name;    cout<<"copy"<<endl;}void Person::setAge(int newAge){    age=newAge;}void Person::getAge(){    cout<<age<<endl;}void Person::getName(){    cout<<name<<endl;}int main(){    Person *q=new Person(3,'s');//下面一行既可以加上，也可以不加，因为这一行赋初值     //q->age=3;    cout<<q->geta()<<endl;    //q->name='s';    cout<<q->getn()<<endl;    delete []q;    return 0;}//3//s
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