1-12-5 异常恢复

#include <iostream>
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#include <exception>
using namespace std;

class newBad
{
    static int i;
    static void *p;

public:
    void *operator new(size_t sz)
    {
        p = ::operator new(sz);
        cout << "The newBad object number: " << i + 1 << " has been created" << endl;
        if (++i >= 11)
        {
            throw out_of_range("the 11st object created failed.");
        }
        return p;
    }

    static void releaseMemory()
    {
        if (p)
        {
            ::operator delete(p);
            cout << "the " << i << "st object was freed" << endl;
            i--;
        }
    }
};

int newBad::i = 0;
void *newBad::p = nullptr;

int main(int argc, char const *argv[])
{
    while (true)
    {
        try
        {
            newBad *mp = new newBad;
        }
        catch (const std::exception &e)
        {
            std::cerr << e.what() << '\n';
            newBad::releaseMemory();
        }
    }
    return 0;
}