prototype.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <time.h>
   4
   5 #define COLS 80
   6 #define ROWS 25
   7
   8 #define DEAD ' '
   9 #define ALIVE '#'
  10
  11 #define INIT_RATIO 10
  12
  13 #define STR(x) _STR(x)
  14 #define _STR(x) #x
  15
  16 static void clearscr() {
  17   printf("\e[1;1H\e[2J");
  18 }
  19
  20 static void print_row(char row[COLS]) {
  21   printf("%." STR(COLS) "s\n", row);
  22 }
  23
  24 static void print_grid(char grid[COLS * ROWS]) {
  25   for (int i = 0; i < ROWS; i++)
  26     print_row(grid + i * COLS);
  27 }
  28
  29 static void init_grid(char grid[COLS * ROWS]) {
  30   for (int i = 0; i < ROWS * COLS; i++) {
  31     if (rand() % INIT_RATIO)
  32       grid[i] = DEAD;
  33     else
  34       grid[i] = ALIVE;
  35   }
  36 }
  37
  38 int main () {
  39   char grid[COLS * ROWS];
  40
  41   srand(time(0));
  42   init_grid(grid);
  43
  44   clearscr();
  45   print_grid(grid);
  46
  47   return 0;
  48 }