TypeScript获取二叉树的镜像实例

export function MirrorImageOfTree(node: BinaryTreeNode | null): void {
  if (node == null) return;
  if (node.left == null && node.right == null) return;
  // 交换左右子节点
  const temp = node.left;
  node.left = node.right;
  node.right = temp;
  if (node.left) {
    MirrorImageOfTree(node.left);
  }
  if (node.right) {
    MirrorImageOfTree(node.right);
  }
}

const tree: BinaryTreeNode = {
  key: 8,
  left: {
    key: 5,
    left: { key: 3 },
    right: { key: 7 }
  },
  right: { key: 18, left: { key: 13 }, right: { key: 22 } }
};
MirrorImageOfTree(null);
console.log("镜像后的树", tree);