#include <iostream>
using namespace std;

class MyException : public exception {

    public:

        const char * what () const throw () {
    
            return "C++ Exception";

        }
};

int main () {

    double devident, devisor;
    string buff;

    cout << "Input devident:" << endl;
    cin >> devident;
    getline(cin, buff);

    cout << "Input devisor:" << endl;
    cin >> devisor;
    getline(cin, buff);

    // 显式地抛出异常
    try {

        if (devisor == 0) {
            
            throw "Devisor can NOT be 0!";

        }

        cout << devident << " / " << devisor << " = " << devident/devisor << endl;

    } catch (const char* msg) {

        cout << msg << endl;

    }

    // 隐式地抛出异常
    string s = "hello";
    try {

        char c = s.at(100);  //拋出 out_of_range 异常

    } catch (out_of_range & e) {

        cout << e.what() << endl;

    }

    // 显式地抛出自定义异常
    try {
    
        throw MyException();

    } catch (MyException& e) {

        cout << e.what() << endl;

    }

}