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fix translated article

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fuyanjie 2022-08-07 11:28:28 +08:00
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commit ae0b3468d1
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translated/tech/20210823 Write a chess game using bit-fields and masks.md
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@ -136,7 +136,7 @@ AND 00000111 = 7
int
is_black(int piece)
{
  return (piece & BLACK);
  return (piece & BLACK);
}
```
这样之所以有效，是因为 `BLACK` 的值为 8（二进制下的 `00001000`）。在 C 语言中，任何非零值都被视为 True，零总是 False。所以如果 `5,3` 处的棋子是黑色的，则 `is_black(board[5][3])` 返回 True 值 (8)；如果是白色的，则返回 False 值 (0)。