1-12-2 创建自己的异常类

#include <iostream>
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#include <exception>
using namespace std;
class MyClass
{
    class Myexception : public logic_error
    {
    public:
        Myexception(const char *s) : logic_error(s) {}
    };

public:
    void ThrowExcept() throw(Myexception)
    {
        throw Myexception("my exception");
    }
};

int main()
{
    try
    {
        MyClass mc;
        mc.ThrowExcept();
    }
    catch (const std::exception &e)
    {
        std::cerr << e.what() << '\n';
    }
}