game-example.c

#include <stdio.h>
#include <math.h>
#include <string.h>
#define NUMCARDS 9
#define PRODUCTION 1 /** 0=debug-mode | 1=production mode **/
int getCards(int *);

void displayCards(int *, int);

int getSuit(int codedNumber);

int getCardValue(int codedNumber);

int calculateHandValue(int *, int);

int simpleSumCards(int *, int numCards);

int hasThreeOrMoreNonNumberCards(int *, int numCards);

int isPrime(unsigned int number);

int nextHighestPowerOfTwo(int value);

int main() {
    int numCards;

    printf("\n Welcome to Up-To-9-Cards Game!");
    printf("\n================================\n");
#if PRODUCTION == 1
    /** User Interface - Production mode **/
    int cards[NUMCARDS];
    numCards = getCards(&cards[0]);
#endif // PRODUCTION
#if PRODUCTION == 0
    /** Test Code - Debug mode **/
    printf("\nRunning program in Debug mode\n");
    // int cards[] = {4,5,6,7,40,41,42,43,51};  //simpleValue = 50
    // int cards[] = {22, 8, 16, 45, 2};  // example 1  - 22 points
    // int cards[] = {47,9,40,48};        // example 2 - 1232 points
    // int cards[] = {24};                // example 3 - 15 points
    int cards[] = {50, 49, 2};            // example 4 - 1003 points
    numCards = sizeof(cards) / sizeof(int);
#endif // PRODUCTION
    displayCards(&cards[0], numCards);
    printf("\n\nDone!\n");
    return 0;
}

int getSuit(int codedNumber) {
    return codedNumber % 4;
}

int getCardValue(int codedNumber) {
    return (codedNumber / 4) + 1;
}

int getCards(int arr[]) {
    int numCards = 0;
    int input;

    while (numCards <= 8) {
        printf("Please enter a card or enter -1 to end: ");
        scanf("%d", &input);
        if (input <= 51 && input >= 0) {
            arr[numCards] = input;
        } else if (input == -1) {
            return numCards;
        } else {
            printf("Not a valid card entry\n");
            continue;
        }
        numCards++;
    }
    return numCards;
}

void displayCards(int arr[], int size) {
    printf("Your hand is:\n");
    for (int i = 0; i < size; i++) {
        int cardValue = getCardValue(arr[i]);
        int suitNum = getSuit(arr[i]);
        char suit[10];
        if (suitNum == 0) {
            strncpy(suit, "Clubs", 10);
        } else if (suitNum == 1) {
            strncpy(suit, "Spades", 10);
        } else if (suitNum == 2) {
            strncpy(suit, "Diamonds", 10);
        } else {
            strncpy(suit, "Hearts", 10);
        }
        printf("         %d of %s\n", cardValue, suit);
    }

    printf("\n");
    int handValue = calculateHandValue(arr, size);
    printf("The Total value of your hand is:\n%d", handValue);
}

int calculateHandValue(int arr[], int size) {
    int baseScore = simpleSumCards(arr, size);

    int totalValue = baseScore;
    if (hasThreeOrMoreNonNumberCards(arr, size)) {
        totalValue = totalValue * totalValue + 7;
    }
    if (isPrime(totalValue)) {
        totalValue = totalValue + nextHighestPowerOfTwo(totalValue);
    }
    return totalValue;
}

int nextHighestPowerOfTwo(int value) {
    return pow(2, ceil(log2(value)));
}

int simpleSumCards(int arr[], int numCards) {
    int sum = 0;
    for (int i = 0; i < numCards; i++) {
        sum = sum + getCardValue(arr[i]) - getSuit(arr[i]);
    }

    return sum;
}

int hasThreeOrMoreNonNumberCards(int arr[], int numCards) {
    int count = 0;
    for (int i = 0; i < numCards; i++) {
        if (getCardValue(arr[i]) >= 11 || getCardValue(arr[i]) == 1) {
            count++;
        }
    }

    return count >= 3;
}

int isPrime(unsigned int number) {
    unsigned int i;
    for (i = 2; i * i <= number / 2; i++) {
        if (number % i == 0) return 0;
    }
    return 1;
}