useReducer钩子和减法器函数问题

import React, { useReducer } from 'react';

// 定义reducer函数
const reducer = (state, action) => {
  switch (action.type) {
    case 'DECREMENT':
      return { count: state.count - 1 };
    default:
      return state;
  }
};

const Counter = () => {
  // 初始化状态
  const initialState = { count: 0 };

  // 使用useReducer
  const [state, dispatch] = useReducer(reducer, initialState);

  return (
    <div>
      <p>Count: {state.count}</p>
      <button onClick={() => dispatch({ type: 'DECREMENT' })}>Decrement</button>
    </div>
  );
};

export default Counter;