Need help fixing this function

[Flukejiver]

How can I fix this? I know that the problem is with the bool's but I've been having trouble with it.

The program is for password verification.

  bool validate (string userString1, bool& longEnough, bool& foundUpper, bool& foundLower, bool& foundDigit)
{
    longEnough = false;
    foundUpper = false;
    foundLower = false;
    foundDigit = false;

    int strLen = userString1.length();

    if (strLen > 7)
        longEnough = true;

    if (isupper)
        foundUpper = true;

    if (islower)
        foundLower = true;

    if (isdigit)
        foundDigit = true;
}

[TarikNeaj]

Your problem is that you haven't looked up how the function you're using works.

if (isupper) // if what is upper? Bananas, the sky, your password perhaps?

if (islower) // same

if (isdigit) // same

http://www.cprogramming.com/fod/isupper.html