简历知识点

╰半橙微兮° 2024-04-19 16:24 16阅读 0赞

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### ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI2MDc5MDkz_size_16_color_FFFFFF_t_70 10][] ###

### **[智能指针][Link 1]** ###

### [C++11常用特性的使用经验总结][C_11] ###

### [面试题23. 链表中环的入口结点][23.] ###

## ##

### [面试题24. 反转链表][24.] ###

## ##

### [面试题9. 用两个栈实现队列][9.] ###

### [题目二：用两个队列实现一个栈][Link 2] ###

### [面试题7. 重建二叉树][7.] ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI2MDc5MDkz_size_16_color_FFFFFF_t_70 11][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI2MDc5MDkz_size_16_color_FFFFFF_t_70 12][]

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![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI2MDc5MDkz_size_16_color_FFFFFF_t_70 14][]

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![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI2MDc5MDkz_size_16_color_FFFFFF_t_70 16][]

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### BST树（二叉搜索树）特点： ###

![20190920092403921.png][]

## ##

### **[AVL树][AVL]特点：** ###

1.  具有二叉查找树的全部特性。
2.  每个节点的左子树和右子树的高度差至多等于1。

## ##

### **[红黑树 ][Link 3]：** ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI2MDc5MDkz_size_16_color_FFFFFF_t_70 18][]

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> ###  STL空间配置器及内存优化原理 ###
> 
> 参考回答：
> 
> 1）二级配置器结构  
> STL 内存管理使用二级内存配置器。
> 
> 1、第一级配置器  
> 第一级配置器以 malloc()，free()，realloc()等 C函数执行实际的内存配置、释放、重新配置等操作，并且能在  
> 内存需求不被满足的时候，调用一个指定的函数。  
> 一级空间配置器分配的是大于 128 字节的空间  
> 如果分配不成功，调用句柄释放一部分内存  
> 如果还不能分配成功，抛出异常
> 
> 2、第二级配置器  
> 在 STL 的第二级配置器中多了一些机制，避免太多小区块造成的内存碎片，小额区块带来的不仅是内存碎片，  
> 配置时还有额外的负担。区块越小，额外负担所占比例就越大。
> 
> 3、分配原则  
> 如果要分配的区块大于 128bytes，则移交给第一级配置器处理。  
> 如果要分配的区块小于 128bytes，则以内存池管理（memory pool），又称之次层配置（sub-allocation）：每  
> 次配置一大块内存，并维护对应的 16 个空闲链表（free-list）。下次若有相同大小的内存需求，则直接从 free-  
> list 中取。如果有小额区块被释放，则由配置器回收到 free-list 中。  
> 当用户申请的空间小于 128 字节时，将字节数扩展到 8 的倍数，然后在自由链表中查找对应大小的子链表  
> 如果在自由链表查找不到或者块数不够，则向内存池进行申请，一般一次申请 20 块  
> 如果内存池空间足够，则取出内存  
> 如果不够分配 20 块，则分配最多的块数给自由链表，并且更新每次申请的块数  
> 如果一块都无法提供，则把剩余的内存挂到自由链表，然后向系统 heap 申请空间，如果申请失败，则看看自由  
> 链表还有没有可用的块，如果也没有，则最后调用一级空间配置器
> 
> 2）二级内存池  
> 二级内存池采用了 16 个空闲链表，这里的 16 个空闲链表分别管理大小为 8、16、24......120、128 的数据块。  
> 这里空闲链表节点的设计十分巧妙，这里用了一个联合体既可以表示下一个空闲数据块（存在于空闲链表中）  
> 的地址，也可以表示已经被用户使用的数据块（不存在空闲链表中）的地址。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI2MDc5MDkz_size_16_color_FFFFFF_t_70 57][]

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### **二分查找 ：** ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI2MDc5MDkz_size_16_color_FFFFFF_t_70 59][]

### **判断大小端：** ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI2MDc5MDkz_size_16_color_FFFFFF_t_70 60][]

**堆排：**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI2MDc5MDkz_size_16_color_FFFFFF_t_70 61][]

**快排：**

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[Link 1]: https://blog.csdn.net/qccz123456/article/details/80973228
[C_11]: https://www.cnblogs.com/feng-sc/p/5710724.html
[23.]: https://blog.csdn.net/qq_26079093/article/details/98957260
[24.]: https://blog.csdn.net/qq_26079093/article/details/98872459
[9.]: https://blog.csdn.net/qq_26079093/article/details/98988399
[Link 2]: https://blog.csdn.net/qq_26079093/article/details/98989769
[7.]: https://blog.csdn.net/qq_26079093/article/details/99700991
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[20190920092403921.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/18/e2db7625daa94f9a8a2c5416fe928776.png
[AVL]: https://blog.csdn.net/qq_26079093/article/details/100784461
[Link 3]: https://blog.csdn.net/qq_34645958/article/details/80775759
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