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  1. #include <stdbool.h>
  2. #include <stdio.h>
  3. #include <stdlib.h>
  4. static void graph(int *board) {
  5.   puts("");
  6.   for (int y = 0; y < 3; ++y) {
  7.     for (int x = 0; x < 3; ++x) {
  8.       printf("|%s",
  9.           board[y * 3 + x] == 1 ? "o" : board[y * 3 + x] == 2 ? "x" : " ");
  10.     }
  11.     puts("|");
  12.   }
  13. }
  14. static void input(int *board, int count) {
  15.   int x, y;
  16.   char buf[BUFSIZ];
  17.   do {
  18.     printf("x y: ");
  19.     fgets(buf, BUFSIZ, stdin);
  20.     if (sscanf(buf, " %d%d", &x, &y) != 2) continue;
  21.     if (x < 1 || 4 <= x) continue;
  22.     if (y < 1 || 4 <= y) continue;
  23.     if (board[(y - 1) * 3 + (x - 1)]) continue;
  24.     board[(y - 1) * 3 + (x - 1)] = count % 2 + 1;
  25.     break;
  26.   } while (true);
  27. }
  28. static bool check_board_full(int *board) {
  29.   bool full = true;
  30.   for (int i = 0; i < 3 * 3; ++i)
  31.     full = (full && !!board[i]);
  32.   return full;
  33. }
  34. static bool check_rows(int *board) {
  35.   for (int i = 0; i < 3; ++i) {
  36.     if (board[i * 3] && board[i * 3] == board[i * 3 + 1]
  37.         && board[i * 3 + 1] == board[i * 3 + 2]) return true;
  38.   }
  39.   for (int i = 0; i < 3; ++i) {
  40.     if (board[i] && board[i] == board[3 + i] && board[3 + i] == board[6 + i])
  41.       return true;
  42.   }
  43.   if (board[0] && board[0] == board[3 + 1] && board[3 + 1] == board[6 + 2])
  44.     return true;
  45.   if (board[2] && board[2] == board[3 + 1] && board[3 + 1] == board[6])
  46.     return true;
  47.   return false;
  48. }
  49. static bool check(int *board) {
  50.   if (check_rows(board)) return true;
  51.   return check_board_full(board);
  52. }
  53. int main(void) {
  54.   int board[3 * 3] = { 0 };
  55.   int count = 0;
  56.   for (graph(board); !check(board); input(board, count++), graph(board))
  57.     ;
  58.   if (check_rows(board)) {
  59.     if (count % 2) puts("o win");
  60.     else puts("x win");
  61.   }
  62.   puts("draw");
  63.   return 0;
  64. }
  65.  
Success #stdin #stdout 0s 5444KB
comments (?)
stdin
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1 1
2 2
3 3
1 2
3 2
3 1
1 3
2 3
2 1
stdout
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| | | |
| | | |
| | | |
x y: 
|o| | |
| | | |
| | | |
x y: 
|o| | |
| |x| |
| | | |
x y: 
|o| | |
| |x| |
| | |o|
x y: 
|o| | |
|x|x| |
| | |o|
x y: 
|o| | |
|x|x|o|
| | |o|
x y: 
|o| |x|
|x|x|o|
| | |o|
x y: 
|o| |x|
|x|x|o|
|o| |o|
x y: 
|o| |x|
|x|x|o|
|o|x|o|
x y: 
|o|o|x|
|x|x|o|
|o|x|o|
draw
https://ideone.com/pfJA5A
language:
C (gcc 8.3)
created:
1 year ago
visibility:
public

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