isValidNumber modified

int isValidNumber()
{
    int number;
    number = 0;
    bool isValid = false;

    while (!isValid)
    {
        cin >> number;

        if (cin.fail())
        {
            cin.clear();
            cin.ignore(10000, '\n');
            cout << "You have entered an invalid number." << endl;

        }

        else
        {

            if (number <= 0)
            {
                cout << "You have entered a negative number." << endl;


            }

            else
            {
                isValid = true;
                return number;
            }
        }


    }

}