gistfile1.c

bool hasNotGuessedCorrectly;
hasNotGuessedCorrectly = true;

while(hasNotGuessedCorrectly)
{
    if(yourGuess < myNumber) 
    {
        printf("Too low.\n");
    }
    else
    {
        printf("Too high.\n");
    }

    yourGuess = getNumberFromUser();
    hasNotGuessedCorrectly = (yourGuess != myNumber);
}
printf("Yay\n");