battleship.c

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <time.h>


#define SIZE 6
// Do you understand this code? This is how proper validation is done

//Board print
void printBoard(char B[SIZE][SIZE]) {
    int i, j;

    for (i = 0; i < SIZE; ++i) {
        printf("[ ");
        for (j = 0; j < SIZE; ++j) {
            printf("%c ", B[i][j]);
        }
        printf("]\n");
    }
}

// Return random number using rand
int getRandomNumber(int from, int to) {

    // Create borders of random number 
    return from + rand() % (to + 1 - from);
}

//TODO: Handle validation if ship doesn't fit to the position 
int getStartX() {
    int start_x;

    while (true) {
        printf("Please select the start x location of your ship: ");
        scanf("%i", &start_x);

        if (start_x >= 0 && start_x < SIZE) {
            break;
        }

        printf("Please enter a valid start_x\n");
    }


    return start_x;
}

//TODO: Handle validation if ship doesn't fit to the position 
int getStartY() {
    int start_y;

    while (true) {
        printf("Please select the start y location of your ship: ");
        scanf("%i", &start_y);

        if (start_y >= 0 && start_y < SIZE) {
            break;
        }

        printf("Please enter a valid start_y\n");
    }


    return start_y;
}

int getOrientation() {
    int orientation;

    while (true) {
        printf("Please select the start y location of your ship: ");
        printf("Horizontally (1) or vertically (2): ");
        scanf("%i", &orientation);

        if (orientation == 1 || orientation == 2) {
            break;
        }

        printf("Please enter a valid orientation\n");
    }

    return orientation;
}

// Asks user for all the data and creates a 2d array which every row has this format:
// {lengthOfBoard, start_x, start_y, orientation}
void getShipData(int shipData[2][4]) {
    printf("Enter data for your battleship\n");
    shipData[0][0] = 4;
    shipData[0][1] = getStartX();
    shipData[0][2] = getStartY();
    shipData[0][3] = getOrientation();

    printf("Enter data for your patrol ship\n");
    shipData[1][0] = 2;
    shipData[1][1] = getStartX();
    shipData[1][2] = getStartY();
    shipData[1][3] = getOrientation();
}

//Fill board with 'o'
void fillBoardWithWater(char B[SIZE][SIZE]) {
    int i, j;

    for (i = 0; i < SIZE; ++i) {
        for (j = 0; j < SIZE; ++j) {
            B[i][j] = 'o';
        }
    }
}

void addShipsToBoard(char B[SIZE][SIZE], int data[2][4]) {
    int i, j;

    for (j = 0; j < 2; ++j) {
        // if horizontal
        if (data[j][3] == 1) {
            // Then add 's' to the row
            for (i = data[j][2]; i <= data[j][0]; ++i) {
                B[data[j][1]][i] = 's';
            }
        }
        else {
            // Then add 's' to the column
            for (i = data[j][1]; i <= data[j][0]; ++i) {
                B[i][data[j][2]] = 's';
            }
        }
    }
}

//Main function for creating the board of the user filled with ships
void getuserBoard() {
    char userBoard[SIZE][SIZE];
    int shipData[2][4];

    fillBoardWithWater(userBoard);
    getShipData(shipData);
    addShipsToBoard(userBoard, shipData);

    printBoard(userBoard);

    printf("Battleship %i %i %i %i", shipData[0][0], shipData[0][1], shipData[0][2], shipData[0][3]);
}

void createFakeShips(int shipData[2][4]) {
    //Length of ship
    shipData[0][0] = 4;
    shipData[0][1] = getRandomNumber(0, SIZE - shipData[0][0]); //Random x_start
    shipData[0][2] = getRandomNumber(0, SIZE - shipData[0][0]); //Random y_start
    shipData[0][3] = getRandomNumber(0, 1); //Random orientation

    shipData[1][0] = 2;
    shipData[1][1] = getRandomNumber(0, SIZE - shipData[0][0]); //Random x_start
    shipData[1][2] = getRandomNumber(0, SIZE - shipData[0][0]); //Random y_start
    shipData[1][3] = getRandomNumber(0, 1); //Random orientation
}

//Main function for creating the board of the computer filled with RANDOM ships
void getComputerBoard() {
    char computerBoard[SIZE][SIZE];
    int shipData[2][4];

    fillBoardWithWater(computerBoard);
    createFakeShips(shipData);
}

int main() {
    // Create randomness using time
    srand(time(NULL));

    //getuserBoard();
    getComputerBoard();

    return 0;
}