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| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <sys/ioctl.h> | |
| #include <time.h> | |
| #include <unistd.h> | |
| int WIDTH = 80; | |
| int HEIGHT = 40; | |
| char getCell(char *buffer, int x, int y) { | |
| if (x < 0 || x >= WIDTH || y < 0 || y >= HEIGHT) | |
| return 0; | |
| return buffer[x + y * WIDTH]; | |
| } | |
| void setCell(char *buffer, int x, int y, char n) { | |
| if (x < 0 || x >= WIDTH || y < 0 || y >= HEIGHT) | |
| return; | |
| buffer[x + y * WIDTH] = n; | |
| } | |
| void clear(char *buffer) { | |
| int i; | |
| for (i = 0; i < WIDTH*HEIGHT; i++) | |
| buffer[i] = 0; | |
| } | |
| void randomize(char *buffer) { | |
| int i; | |
| for (i = 0; i < WIDTH*HEIGHT; i++) | |
| buffer[i] = rand() & 1; | |
| } | |
| void step(char *last, char *current) { | |
| int x, y, c, xoff, yoff; | |
| char l, n; | |
| for (y = 0; y < HEIGHT; y++) { | |
| for (x = 0; x < WIDTH; x++) { | |
| c = 0; | |
| for (yoff = -1; yoff <= 1; yoff++) { | |
| for (xoff = -1; xoff <= 1; xoff++) { | |
| if (yoff != 0 || xoff != 0) | |
| if (getCell(last, x + xoff, y + yoff)) | |
| c++; | |
| } | |
| } | |
| l = getCell(last, x, y); | |
| if (l) | |
| n = (c >= 2 && c <= 3) & 1; | |
| else | |
| n = (c == 3) & 1; | |
| setCell(current, x, y, n); | |
| } | |
| } | |
| } | |
| void display(char *last, char *current) { | |
| int x, y; | |
| char l, c, n; | |
| printf("\033[2J\033[H"); | |
| for (y = 0; y < HEIGHT; y++) { | |
| for (x = 0; x < WIDTH; x++) { | |
| l = getCell(last, x, y); | |
| c = getCell(current, x, y); | |
| n = l << 1 | c; | |
| switch (n) { | |
| case 0: | |
| printf(" "); | |
| break; | |
| case 1: | |
| printf("\e[33mo"); | |
| break; | |
| case 2: | |
| printf("\e[31mX"); | |
| break; | |
| case 3: | |
| printf("\e[32mO"); | |
| break; | |
| } | |
| } | |
| printf("\n"); | |
| } | |
| } | |
| int main() { | |
| char *last, *current, *temp; | |
| struct winsize w; | |
| ioctl(0, TIOCGWINSZ, &w); | |
| WIDTH = w.ws_col; | |
| HEIGHT = w.ws_row - 1; | |
| last = malloc(WIDTH * HEIGHT); | |
| current = malloc(WIDTH * HEIGHT); | |
| srand(time(NULL)); | |
| randomize(last); | |
| for (;;) { | |
| step(last, current); | |
| display(last, current); | |
| usleep(100000); | |
| temp = last; | |
| last = current; | |
| current = temp; | |
| } | |
| } |
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