类嵌套处理异常

/* 类嵌套处理异常 */

#include<iostream>
#include<cstring>

using namespace std;


class print3dbox
{
public:
    print3dbox(int a,int b,int c)
    {
        // a b c 在10-1000之间;

        if (a==0 || b==0 || c==0)
        {
            if(a==0 && b!=0 && c!=0)
            {
                throw zero(1);
            }
            //throw zero();
        }
        else if(a>1000 || b>1000 || c>1000)
        {
            throw big();
        }
        else if ((a>0 && a<10) || (b>0 && b<10) || (c>0 && c<10))
        {
            throw small();
        }
        else if (a<0 || b<0 || c<0)
        {
            throw error();
        }

        x=a;
        y=b;
        z=c;        
    }
    
    // 四个类分别是嵌套类  处理围绕本类的异常
    // 嵌套类在类的内部 不需要类的声明
    class zero
    {
    public:
        int errorcode = 0;
        zero(int id):errorcode(id)
        {
        
        }
    };

    class big
    {
    };


    class small
    {
    };

    class error
    {
    };

private:
    int x;
    int y;
    int z;
};

void main()
{
    try
    {
        print3dbox box(11,12,13);
        cout << "创建成功" << endl;
    }
    catch (print3dbox::error e)
    {
        cout << typeid(e).name() << endl;
    }
    catch (print3dbox::small e)
    {
        cout << typeid(e).name() << endl;
    }
    catch (print3dbox::big e)
    {
        cout << typeid(e).name() << endl;
    }
    catch (print3dbox::zero e)
    {
        if(e.errorcode == 1)
        {
        
        }
        cout << typeid(e).name() << endl;
    }

    cin.get();
}