C++ 抛出异常

#include <iostream>
using namespace  std;

int  division(int a, int b)  //传入2个int型变量若被除数或者除数为0 则抛出异常否则返回结果
{
    if (a == 0)
    {
        cout << "抛出异常" << endl;
        throw 100;
    }
    else if (b == 0)
    {
        cout << "抛出异常" << endl;
        throw 101;
    }
    return a / b;
}
int main()
{    
    run:
    try
    {
        while (1)  //循环输入a和b  并输出
        {
            cout << "请输入两个正整数并执行相除操作" << endl;
            int a, b;
            cin >> a >> b;
            cout<<"两个数相除结果为:"<<division(a, b)<<endl;
        }
    }
    catch (const  int m_num)
    {
        if (m_num == 100)
        {
            cout << "被除数不能为0" << endl;
            cout << "即将重新输入........" << endl;
            goto run;//返回顶部重新处理
        }
        else if (m_num == 101)
        {
            cout << "除数不能为0" << endl;
            cout << "即将重新输入........" << endl;
            goto run; //返回顶部重新处理
        }
    }
    return 0;
}