react 写一个五子棋代码

好的，我可以回答这个问题。以下是一个简单的 React 五子棋代码示例：

import React, { useState } from 'react';

const Board = () => {
  const [board, setBoard] = useState(Array(9).fill(null));
  const [xIsNext, setXIsNext] = useState(true);

  const handleClick = (i) => {
    const newBoard = [...board];
    if (calculateWinner(board) || newBoard[i]) {
      return;
    }
    newBoard[i] = xIsNext ? 'X' : 'O';
    setBoard(newBoard);
    setXIsNext(!xIsNext);
  };

  const renderSquare = (i) => {
    return (
      <button className="square" onClick={() => handleClick(i)}>
        {board[i]}
      </button>
    );
  };

  const winner = calculateWinner(board);
  const status = winner ? `Winner: ${winner}` : `Next player: ${xIsNext ? 'X' : 'O'}`;

  return (
    <div>
      <div className="status">{status}</div>
      <div className="board-row">
        {renderSquare(0)}
        {renderSquare(1)}
        {renderSquare(2)}
      </div>
      <div className="board-row">
        {renderSquare(3)}
        {renderSquare(4)}
        {renderSquare(5)}
      </div>
      <div className="board-row">
        {renderSquare(6)}
        {renderSquare(7)}
        {renderSquare(8)}
      </div>
    </div>
  );
};

const calculateWinner = (squares) => {
  const lines = [
    [0, 1, 2],
    [3, 4, 5],
    [6, 7, 8],
    [0, 3, 6],
    [1, 4, 7],
    [2, 5, 8],
    [0, 4, 8],
    [2, 4, 6],
  ];
  for (let i = 0; i < lines.length; i++) {
    const [a, b, c] = lines[i];
    if (squares[a] && squares[a] === squares[b] && squares[a] === squares[c]) {
      return squares[a];
    }
  }
  return null;
};

export default Board;

这个代码创建了一个 `Board` 组件，它包含了一个 3x3 的棋盘和一些状态。每个棋子都是一个按钮，当点击按钮时，会在棋盘上放置一个 X 或 O。`calculateWinner` 函数用于判断是否有一方获胜。