#c++#异常处理##

#异常处理#c++
定义一个基类person，包含数据成员姓名、性别、年龄。基类派生出teacher类，它包含数据成员职称，成员函数check），该成员函数可根据职称检测年龄是否正确，检测标准是，教授的年龄大于30岁，副教授的年龄大于26岁，讲师的年龄大于23岁，助教的年龄大于20岁。

运行结果：

代码一：使用try catch语句：

#include <iostream>
#include <iomanip>
#include <string>
using namespace std;
//定义一个基类person，包含数据成员姓名、性别、年龄。
//基类派生出teacher类，它包含数据成员职称，成员函数check），
//该成员函数可根据职称检测年龄是否正确，检测标准是，教授的年龄大于30岁，副教授的年龄大于26岁，讲师的年龄大于23岁，助教的年龄大于20岁。



class person
{
protected:
    string name;
    string sex; //性别
    int age; //年龄
public:
    person() { name = ""; sex = ""; age = 0; }
    person(string _n, string _s, int _age) :name(_n), sex(_s), age(_age) {}

    int getAge() { return age; }
};

class teacher :public person
{
private:
    string position; //职位
public:
    teacher() {}
    teacher(string _n, string _s, int _age, string _p) :person(_n, _s, _age) { position = _p; }
    void check()
    {
        try {
            if (position.compare("教授") == 0 && age > 30)
            {
                cout << name << ":" << position << "," << age << ">30,合法" << endl;
                return;
            }
            else
                throw(1);

            if (position.compare("副教授") == 0 && age > 26)
            {
                cout << name << ":" << position << "," << age << ">26,合法" << endl;
                return;
            }
            else
                throw(2);

            if (position.compare("讲师") == 0 && age > 23)
            {
                cout << name << ":" << position << "," << age << ">23,合法" << endl;
                return;
            }
            else
                throw(3);

            if (position.compare("助教") == 0 && age > 20)
            {
                cout << name << ":" << position << "," << age << ">20,合法" << endl;
                return;
            }
            else
                throw(4);
            throw(5);
        }
        catch (int n)
        {
            switch (n)
            {
            case 1:
                cout << name << ":" << position << "," << age << "<=30,不合法" << endl;
                break;
            case 2:
                cout << name << ":" << position << "," << age << "<=26,不合法" << endl;
                break;
            case 3:
                cout << name << ":" << position << "," << age << "<=23,不合法" << endl;
                break;
            case 4:
                cout << name << ":" << position << "," << age << "<=20,不合法" << endl;
                break;
            default:
                break;
            }
        }
        
    }
};


int main()
{
    teacher t1("张三", "男", 33, "教授");
    t1.check();

    teacher t2("李四", "男", 20, "副教授");
    t2.check();
    return 0;
}

代码二：不适用try catch：

#include <iostream>
#include <iomanip>
#include <string>
using namespace std;
//定义一个基类person，包含数据成员姓名、性别、年龄。
//基类派生出teacher类，它包含数据成员职称，成员函数check），
//该成员函数可根据职称检测年龄是否正确，检测标准是，教授的年龄大于30岁，副教授的年龄大于26岁，讲师的年龄大于23岁，助教的年龄大于20岁。



class person
{
protected:
    string name;
    string sex; //性别
    int age; //年龄
public:
    person() { name = ""; sex = ""; age = 0; }
    person(string _n, string _s, int _age) :name(_n), sex(_s), age(_age) {}

    int getAge() { return age; }
};

class teacher :public person
{
private:
    string position; //职位
public:
    teacher() {}
    teacher(string _n, string _s, int _age, string _p) :person(_n, _s, _age) { position = _p; }
    int check()
    {
        if (position.compare("教授") == 0 && age > 30)
            return 1;
        if (position.compare("副教授") == 0 && age > 26)
            return 1;
        if (position.compare("讲师") == 0 && age > 23)
            return 1;
        if (position.compare("助教") == 0 && age > 20)
            return 1;
        return 0;
    }
};


int main()
{
    teacher t1("张三", "男", 33, "教授");
    if (t1.check())
        cout << "张三：教授，年龄"<< t1.getAge() << "大于30岁," << "合法" << endl;
    else
        cout << "张三：教授，年龄" << t1.getAge() <<"不大于30岁," << "不合法" << endl;

    teacher t2("李四", "男", 20, "副教授");
    if (t2.check())
        cout << "李四：副教授，年龄" << t2.getAge() <<"大于26岁," << "合法" << endl;
    else
        cout << "李四：副教授，年龄" << t2.getAge() <<"不大于26岁," << "不合法" << endl;
    return 0;
}

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