Random Number Game

#include <iostream>
#include <string>
#include <random>
#include <vector>
#include <ctime>
#include <cstdlib>

//guessAmount is a global variable. In most cases this is bad practice, but because it is a
//constant and only an integer it is fine in this specific case.
const unsigned int guessAmount = 5;

bool NumberGuess(unsigned int& randNum)
{
    unsigned int userInput = 0;

    //Loop for the number of guesses that the user is allowed.
    for (int i = 0; i < guessAmount; i++)
    {
        //Allows the user to guess the number
        std::cout << "\n(Guess " << i + 1 << ") : ";
        std::cin >> userInput;
        if (userInput != randNum)
        {
            int guessesLeft = guessAmount - (i + 1);
            if (userInput < randNum)
                std::cout << "\nNo, my number is BIGGER than " << userInput << "! " << guessesLeft << " Guesses Left!";
            else
                std::cout << "\nNo, my number is LESS than " << userInput << "! " << guessesLeft << " Guesses Left!";
        }
        else
            return true;
    }

    return false;
}

int main()
{
    //Seeds srand with the current time.
    std::srand(std::time(0));

    //Creates a pseudo random number for the user to guess.
    unsigned int randNum = rand() % 100 + 1;;

    std::cout << "I have a number between 1 and 100. Can you guess the number?\n\nYou have " << guessAmount << " guessess.";

    //Runs the function and outputs either a winning or a losing message.
    if (NumberGuess(randNum))
        std::cout << "\n\nYes! " << randNum << " is my number!";
    else
        std::cout << "\n\nSorry, you ran out of guesses. My number was " << randNum << ".";
}