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interview-2
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/*
二叉搜索树的查找算法:
在二叉搜索树b中查找x的过程为:
1. 若b是空树,则搜索失败,否则:
2. 若x等于b的根节点的数据域之值,则查找成功;否则:
3. 若x小于b的根节点的数据域之值,则搜索左子树;否则:
4. 查找右子树。
*/
// 在根指针T所指二叉查找树中递归地查找其关键字等于key的数据元素,若查找成功,
// 则指针p指向該数据元素节点,并返回TRUE,否则指针指向查找路径上访问的最终
// 一个节点并返回FALSE,指针f指向T的双亲,其初始调用值为NULL
Status SearchBST(BiTree T, KeyType key, BiTree f, BiTree &p){
if(!T) { //查找不成功
p=f;
return false;
}
else if (key == T->data.key) { //查找成功
p=T;
return true;
}
else if (key < T->data.key) //在左子树中继续查找
return SearchBST(T->lchild, key, T, p);
else //在右子树中继续查找
return SearchBST(T->rchild, key, T, p);
}
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