project

// DESCRIPTION //

/*
    THIS IS THE DESCRIPTION.
*/

// LIBRARIES //

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

using std::cout;
using std::cin;
using std::endl;

// CONSTANTS //

const int numTargetDice = 3;

// PROTOTYPES //

// Prints a wecome statement about the program.
void welcome();

// Returns a valid user input for the amount of rounds to be played.
int getNumRounds();

// asks the user if they what to play again.
bool playAgain();

// does all the actions in one round and repeats for the amount of rounds.
void playRounds(int rounds);

// Generates a random number from  to 18 by rolling 3 dice.
int generateTarget();

// Returns a valid user input for the amount of Dice to be rolled by the user.
int getNumDice();

// calculates the winner of the round. returns false if ther is a tie.
bool calcWinner(int player, int AI, int target, int &playerPoints, int &AIpoints);

// Rolls numDice amout of dice and returns the total;
int getRoll(int numDice);

// Rolls 1/4 dice of the target and returns the total;
int getRollAI(int target);

// Returns a value from 1 to 6.
int rollDice();

// MAIN_FUNCTION //

int main()
{
    welcome();

    // Sets the seed for rand to an everchanging value.
    srand(time(NULL));

    // Looping the program if the user wants want to play again.
    do playRounds(getNumRounds());
    while(playAgain());

    cout << endl;
    return 0;
}

// FUNCTIONS //

// Prints a wecome statement about the program.
void welcome()
{
    cout << endl << "try to get as close as you can to the target with out surpassing it." << endl;
}

// Returns a valid user input for the amount of rounds to be played.
int getNumRounds()
{
    int input = 0;
    while(true)
    {
        cout << "How Many Rounds do you want to play(Must be an odd number): " << endl;
        if(cin >> input)
        {
            if((input % 2) == 0)
            {
                cout << input << " was not an odd intager, please try again." << endl;
            }
            else
            {
                return input;
            }
        }
        else
        {
            cout << input << " was not an intager, please try again." << endl;
        }
    }
}

// Asks if the user wants to play agian, returns true if they want to.
bool playAgain()
{
    char input = 0;
    while(true)
    {
        cout << "Do you want to play again - y/n: ";
        if(cin >> input)
        {
            if((input == 'y') || (input == 'Y'))
            {
                return true;
            }
            else if((input == 'n') || (input == 'N'))
            {
                return false;
            }
            else
            {
                cout << input << " was not y or n, please try again." << endl;
            }
        }
        else
        {
            cout << input << " was not a char, please try again." << endl;
        }
    }
}

// does all the actions in one round and repeats for the amount of rounds.
void playRounds(int rounds)
{
    int playerPoints = 0, AIpoints = 0;

    for (int i = 0; i < rounds; i++)
    {
        int target = generateTarget();
        int numDice = getNumDice();

        while(!calcWinner(getRoll(numDice), getRollAI(target), target, playerPoints, AIpoints))
            cout << "Tie! Re-rolling dice..." << endl;
    }

    printf("\nThe winner was %s because %s had %d point(s) and %s had %d point(s)\n",
          (playerPoints > AIpoints) ? "you" : "the AI",
          (playerPoints > AIpoints) ? "you" : "the AI",
          (playerPoints > AIpoints) ? playerPoints : AIpoints,
          (playerPoints > AIpoints) ? "the AI" : "you",
          (playerPoints > AIpoints) ? AIpoints : playerPoints);
}

// Generates a random number from  to 18 by rolling 3 dice.
int generateTarget()
{
    int target = 0;
    for (int i = 0; i < numTargetDice; i++)
    {
        target += rollDice();
    }

    cout << endl << "the target for this round is " << target << endl;

    return target;
}

// Returns a valid user input for the amount of Dice to be rolled by the user.
int getNumDice()
{
    int input = 0;
    while(true)
    {
        cout << "How Many dice do you want to roll for this round(Must be a positive number): ";
        if(cin >> input)
        {
            if(input < 0)
            {
                cout << input << " was not a positive intager, please try again." << endl;
            }
            else
            {
                return input;
            }
        }
        else
        {
            cout << input << " was not an intager, please try again." << endl;
        }
    }
}

// returns false if there was a tie.
bool calcWinner(int player, int AI, int target, int &playerPoints, int &AIpoints)
{
    if((player <= target) && (AI <= target))
    {
        if(player == AI) return false;

        else if(player > AI)
        {
            cout << "You won this round!" << endl;
            playerPoints++;
            return true;
        }
        else if(AI > player)
        {
            cout << "The AI won this round!" << endl;
            AIpoints++;
            return true;
        }
    }
    else if((player > target) && (AI <= target))
    {
        AIpoints++;
        return true;
    }
    else if((player <= target) && (AI > target))
    {
        playerPoints++;
        return true;
    }
    else if((player > target) && (AI > target)) return false;

    // should never reach this line of code.
    return false;
}

// Rolls numDice amout of dice and returns the total;
int getRoll(int numDice)
{
    int roll = 0;
    for (int i = 0; i < numDice; i++)
    {
        roll += rollDice();
    }
    cout << "your combined roll was " << roll << endl;
    return roll;
}

// Rolls 1/4 dice of the target and returns the total;
int getRollAI(int target)
{
    int roll = 0;

    for (int i = 0; i < (target / 4); i++)
    {
        roll += rollDice();
    }
    cout << "The AI's combined roll was " << roll << endl;
    return roll;
}

// Returns a value from 1 to 6.
int rollDice()
{
    return ((rand() % 6) + 1);
}