conway/conway.c

#include <locale.h>
#include <math.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <wchar.h>

void printGrid(int gridX, int gridY, int** arr)
{
    // print the array for debugging
    wprintf(L"%lc", 0x2554UL); // prints ╔
    for (int j = 0; j < gridX; j++) {
        wprintf(L"%lc", 0x2550UL); // prints ═
    }
    wprintf(L"%lc", 0x2557UL); // prints ╗
    wprintf(L"\n");
    for (int j = 0; j < gridY; j++) {
        wprintf(L"%lc", 0x2551UL); // prints ║
        for (int i = 0; i < gridX; i++) {
            wprintf(L"%lc", ((arr[i][j] == 1) ? 0x0023UL : 0x0020UL));
        }
        wprintf(L"%lc\n", 0x2551UL); // prints ║
    }
    wprintf(L"%lc", 0x255AUL); // prints ╚
    for (int j = 0; j < gridX; j++) {
        wprintf(L"%lc", 0x2550UL);
    }
    wprintf(L"%lc", 0x255DUL); // prints ╝

    return;
}

int main(int argc, char* argv[])
{
    if (argc < 3) {
        printf("Usage: conway <xsize> <ysize> [seed]\n");
        exit(255);
    }
    setlocale(LC_CTYPE, "");
    int gridX = 0, gridY = 0, seed = 0, generation = 0;
    for (int i = argc - 1; i > 0; i--) {
        switch (i) {
        case 1:
            gridX = atoi(argv[i]);
            break;
        case 2:
            gridY = atoi(argv[i]);
            break;
        case 3:
            seed = atoi(argv[i]);
            break;
        }
    }
    if (seed == 0) {
        time_t t;
        srand((unsigned)time(&t));
    } else {
        srand(seed);
    }
    // dynamically allocate the 2D array, could be quite large!
    int* arr[gridX];
    for (int i = 0; i < gridX; i++) {
        arr[i] = (int*)malloc(gridY * sizeof(int));
    }
    // seed the array
    for (int i = 0; i < gridX; i++) {
        for (int j = 0; j < gridY; j++) {
            arr[i][j] = (rand() % 2 == 0) ? 1 : 0;
        }
    }
    printGrid(gridX, gridY, arr);

    return 0;
}