qfedu-cpp-level/day2/ce1.cpp

// Classroom exercises: 课堂练习
// ce
// 类的定义和使用
#include <iostream>
#include <cstring>

using namespace std;

class Person
{
public:
    void init(const char *iname, int iage);
    void setName(const char sname[]);
    void setAge(int sage);
    const char *getname();
    const int getAge();
    const void show();

private:
    char name[32];
    int age;
};

void Person::init(const char *iname, int iage)
{
    strcpy(this->name, iname);
    if (iage > 0 && iage < 100)
        this->age = iage;
    else
    {
        this->age = 0;
        cout << "年龄超出范围，拒绝赋值!" << endl;
    }
}

void Person::setName(const char sname[])
{
    strcpy(this->name, sname);
}

void Person::setAge(int sage)
{
    if (sage > 0 && sage < 100)
        this->age = sage;
    else
    {
        cout << "年龄超出范围，拒绝赋值!" << endl;
    }
}

const char *Person::getname()
{
    return this->name;
}

const int Person::getAge()
{
    return this->age;
}

const void Person::show()
{
    cout << "name = " << this->name << ", age = " << this->age << endl;
}

int main()
{
    Person p1;
    p1.setAge(20);
    p1.setName("flykhan");
    p1.show();

    Person p2;
    p2.init("hello", 0);
    p2.show();

    return 0;
}