Please, is there a way I can wait for a single ENTER key press in all of the below cases? It works fine except when the std::getline() is used, which consumes the \n, and the ENTER needs to be pressed twice.

The code below works fine:

#include <iostream>
#include <limits>

using std::cout;
using std::cin;
using std::string;

void waitForENTERKeyPress();

int main ()
{
    char c;
    string s;

    cout << "Enter c:"; cin >> c;
    waitForENTERKeyPress();

    cout << "Enter c:"; c = cin.get();
    waitForENTERKeyPress();

    cout << "Enter s:"; cin >> s;
    waitForENTERKeyPress();

    cout << "Enter s:"; std::getline(cin, s);
    waitForENTERKeyPress();

    return 0;
}

void waitForENTERKeyPress()
{
    // Does not work with std::getline(...)
    cin.ignore( std::numeric_limits<std::streamsize>::max(), '\n');
    cout << "Press an ENTER to continue...\n";
    cin.get();    
}

====[UPDATE]============================================

Let me rephrase what I am looking for: The way how to make the waitForENTERKeyPress() function working in both cases – with \n in the buffer, when cin operator >> or cin.get() is used and also in cases the std::getline() is used.

From what I understand it is not possible as there is not a way how to detect if the \n is still in the buffer or not. I have tried to use cin.rdbuf()->in_avail(), but it always returns 0.