Thread: Calling a function from a function that comes after it

Hi, I want to call again() from game(), it works on windows but not on mac. When I call it, it says again() is not defined, so I put it before game. Now game() isn't defined. Is there anyway to make this mac compatible?

Code:

#include <cstdlib>
#include <ctime>
#include <iostream>

int again()
{
    using std::cout;
    using std::cin;
    using std::endl;
    cout << "Play again? Y/N ";
    char again;
    cin >> again;
    if (again == 'y' || again == 'Y')
    {
        game();
    }
    else
    {
    return 0;
    }
}

int game()
{
    using std::cout;
    using std::cin;
    using std::endl;
    
    srand((unsigned)time(NULL));
    int randomnum, difficultnumber, number;
    randomnum = rand()%1001;
    char difficulty;
    cout << "Difficulty\n[E]asy (15 guesses) [N]ormal (10 guesses) or [H]ard (5 guesses)?: ";
    cin >> difficulty;
    if (difficulty == 'e' || difficulty == 'E')
    {
        difficultnumber = 15;
        cout << "Easy." << endl << endl << "You have " << difficultnumber << " guesses left.";
    }
    else
    {
        if (difficulty == 'n' || difficulty == 'N')
        {
            difficultnumber = 10;
            cout << "Normal." << endl << endl << "You have " << difficultnumber << " guesses left.";
        }
        else
        {
            if (difficulty == 'h' || difficulty == 'H')
            {
                difficultnumber = 5;
                cout << "Hard." << endl << endl << "You have " << difficultnumber << " guesses left.";
            }
        }
    }
    while (difficultnumber > 0)
    {
        cout << "\nGuess a number between 1 and 1000: ";
        cin >> number;
        if (number == randomnum)
        {
            cout << "You won in " << difficultnumber << " guesses!\n";
			again();
        }
        if (number > randomnum)
        {
            cout << "Too High.";
            difficultnumber--;
            if (difficultnumber == 0)
            {
                cout << endl << "\nSorry, but you have lost. The number was " << randomnum << ".\n";
				again();
            }
            else
            {
                cout << "\nYou have " << difficultnumber << " guesses left.\n";
            }   
        }
        if (number < randomnum)
        {
            cout << "Too Low.";
            difficultnumber--;
            if (difficultnumber == 0)
            {
                cout << endl << "\nSorry, but you have lost. The number was " << randomnum << ".\n";
				again();
            }
            else
            {
                cout << "\nYou have " << difficultnumber << " guesses left.\n";
            }
        }
    }    
}

int main()
{
    game()
	return 0;
}

Thank you,

From what I see, you need to use function prototypes.

First of all, Error 1: error: `game' undecloare (first use this function)
Error 2: error: 1int game()' used prior to declaration
Error 3: error: parse error before `return' // I already fixed this one
And yes this is all one file.
And second of all, what are function prototypes?
Thank you for the speedy response time,

And second of all, what are function prototypes?

You might want to read this website's tutorial on functions.

function prototypes......