Простая проверка для C++

#include <iostream>

using namespace std;

int main()
{
    const int MIN = 0;
    const int MAX = 100;
    int num;
    bool IsIncorrect;

    do {
        IsIncorrect = false;
        cin >> num;

        if (cin.fail())
        {
            IsIncorrect = true;
            cout << "TYPR ERR" << endl;
            cin.clear();
            while (cin.get() != '\n');
        }

        if (!IsIncorrect && (num < MIN || num > MAX))
        {
            IsIncorrect = true;
            cout << "RANGE ERR" << endl;
        }

        if (!IsIncorrect && cin.get() != '\n')
        {
            cout << "Err";
            IsIncorrect = true;
            cin.clear();
            while (cin.get() != '\n');
            cout << endl;
        }
    } while (IsIncorrect);

    cout << num;
}