《c语言数据结构》第8章-查找--自测卷.doc

promote the extension of strictly administering the party grass-roots, but also the educational practice of the mass line of the party and three-three special education results achieved further inherited and expanded. To realize two a learning education is a necessary solution to the present problems of party construction. Strengthen problem consciousness and insisted on problem-oriented, is full of strictly administering the party since the partys 18 a distinctive feature, a successful experience. Secretary Wang noted that some party members still have political awareness, lack of political responsibility issues, party awareness and consciousness of the problem belief does not really believe, slim does not actually fix problems, outspoken, and jump on the assessment of the partys policies, and so on. Bi Lifu Secretary pointed out that a quarter of the economic situation is very serious, there is pressure on environment, seasonal factors and other objective reasons, but mainly subjective problem, is the problem of party members and cadres. Some depressed, negative slack, not responsible, . Double six, one, and two took the lead, build energy burst, Hongshan district, economic prosperity, eco-livable, civilized and harmonious island. It certainly can not be separated from the whole area 646 grass-roots party organizations and 14,146 members of broad participation and support. Through the two study and education, so that every cell of the party health, every organization is strong, so that all members of the vanguard and exemplary role, all the fighting bastion role of grass-roots party organizations into full play so that we can cross the Rapids, overcome all difficulties and the smooth realization of the Thirteen-Five goal. Second, basic learning, focus on learning education must understand the learning content and learning styles Foundation learning these four words are important information inside is very large, capture profound work truth in life. For example, I often say that the good Carpenter NAO Carpenter, why do some carpenters made furniture to have everybody likes it, Carpenter we are not willing to look for him? are apparently two people high and low technology, dig into the deep is firmer when both of his apprentices are not solid, there is no good that way. Luban art of story primary school are learn had, first after six mark test practice conduct, and practice cultivation, and practice perseverance, and practice patience, then with seven days seven night mill axe theory armed, and unity action, seriously learning XI General Secretary on reform development stable, and Interior diplomatic defense, and rule party ruling army of important thought, seriously learning to XI comrade for General Secretary of Central ruling acting political new concept new thought new strategy, seriously learning XI General Secretary study in Inner Mongolia important speech spirit, Guide party members and a deep understanding of a series of important speeches rich connotation and core ideas, which began so thoroughly Marxist positions第8章 查找 自测卷答案 姓名 班级 A题号一二三四五总分题分1027162423100得分一、填空题（每空1分，共10分）1. 在数据的存放无规律而言的线性表中进行检索的最佳方法是 顺序查找（线性查找） 。2. 线性有序表（a1，a2，a3，a256)是从小到大排列的，对一个给定的值k，用二分法检索表中与k相等的元素，在查找不成功的情况下，最多需要检索 8 次。设有100个结点，用二分法查找时，最大比较次数是 7 。3. 假设在有序线性表a20上进行折半查找，则比较一次查找成功的结点数为1；比较两次查找成功的结点数为 2 ；比较四次查找成功的结点数为 8 ；平均查找长度为 3.7 。解：显然，平均查找长度O（log2n）5次（25）。但具体是多少次，则不应当按照公式来计算（即（21log221）/204.6次并不正确！）。因为这是在假设n2m-1的情况下推导出来的公式。应当用穷举法罗列：全部元素的查找次数为（122438455）74； ASL74/20=3.7 ！4【计研题2000】折半查找有序表（4，6，12，20，28，38，50，70，88，100），若查找表中元素20，它将依次与表中元素 28，6，12，20 比较大小。5. 在各种查找方法中，平均查找长度与结点个数n无关的查找方法是 散列查找 。6. 散列法存储的基本思想是由 关键字的值 决定数据的存储地址。7. 有一个表长为m的散列表，初始状态为空，现将n（nhigh) return 0; /查找不到时返回0 mid=(low+high)/2; if(ST.elemmid.key= =key) return mid; else if(ST.elemmid.keykey) return Search_Bin_Recursive(ST, key, low, mid-1); else return Search_Bin_Recursive(ST, key, mid+1, high); /Search_Bin_Recursive 2. 【严题集9.31】试写一个判别给定二叉树是否为二叉排序树的算法，设此二叉树以二叉链表作存储结构。且树中结点的关键字均不同。解：注意仔细研究二叉排序树的定义。易犯的典型错误是按下述思路进行判别：“若一棵非空的二叉树其左、右子树均为二叉排序树，且左子树的根的值小于根结点的值，又根结点的值不大于右子树的根的值，则是二叉排序树”（刘注：即不能只判断左右孩子的情况，还要判断左右孩子与双亲甚至根结点的比值也要遵循（左小右大）原则）。若要采用递归算法，建议您采用如下的函数首部：bool BisortTree(BiTree T, BiTree&PRE)，其中PRE为指向当前访问结点的前驱的指针。（或者直接存储前驱的数值，随时与当前根结点比较）一个漂亮的算法设计如下：int last=0, flag=1; / last是全局变量，用来记录前驱结点值，只要每个结点都比前驱大就行。int Is_BSTree(Bitree T) /判断二叉树T是否二叉排序树，是则返回1，否则返回0 if(T-lchild&flag) Is_BSTree(T-lchild); if(T-datadata; if(T-rchild&flag) Is_BSTree(T-rchild); return flag; /Is_BSTree 3. 【严题集9.22】已知一个含有1000个记录的表，关键字为中国人姓氏的拼音，请给出此表的一个哈希表设计方案，要求它在等概率情况下查找成功的平均查找长度不超过3。解：设计哈希表的步骤为：a) 根据所选择的处理冲突的方法求出装载因子a的上界；b) 由a值设计哈希表的长度m；c) 根据关键字的特性和表长m选定合适的哈希函数。刘注：要求ASL3，则m必然要尽量长，以减少冲突；4. 【严题集9.44】已知某哈希表的装载因子小于1，哈希函数H(key)为关键字（标识符）的第一个字母在字母表中的序号，处理冲突的方法为线性探测开放定址法。试编写一个按第一个字母的顺序输出哈希表中所有关键字的算法。解：注意此题给出的条件：装载因子a1, 则哈希表未填满。由此可写出下列形式简明的算法：void PrintWord(Hash Table ht)/按第一个字母的顺序输出哈希表ht中的标识符。哈希函数为表示符的第一个字母在字母表中的序号，处理冲突的方法是线性探测开放定址法。for(i=1; i=26; i+)j=i;While(ht.elemj.key)if(Hash(ht.elemj.key=i)printf(ht.elemj.key);j=(j+1)%m;/PrintWord社会主义市场经济最重要的“品质”，是诚信、公平、秩序和法治。由于“潜规则”的存在，从事商品经营活动或服务的个别市场主体，不是把主要精力放在如何提高商品或服务的质量上，而是“走捷径”，通过金钱或提供其他利益的方式，打通关节，从而使自己的利益通过非正常的渠道得到实现To sum up, is divided into 9 main parts: 1. with regard to persisting and developing socialism with Chinese characteristics. 18 since the XIOn more than one occasion, General Secretary of the historical origin and development process of socialism with Chinese characteristics, the road of socialism with Chinese characteristics, System Info, system, uphold and develop the understanding of socialism with Chinese characteristics is determined to have been profoundly expounded, further strengthened the party and the people adhere to and develop the confidence and determination of the socialism with Chinese characteristics. XI General Secretarys speech in this regard include the peoples yearning for a better life, that is our goal, closely focus on the development of socialism with Chinese characteristics study and publicize the spirit of party 18, the unwaveringly adhere to the development of socialism with Chinese characteristics, the persistence and good use of Mao Ze-Dongs thought of soul. 2. with regard to the Chinese dream of realizing the great rejuvenation of the Chinese nation. 18 closing soon, the new Central collective leadership when they visited the exhibition of the road to recovery, XI, General Secretary of the solemn declaration the great rejuvenation of the Chinese nation, the greatest dream of the Chinese nation in modern times. Zhihou, on more than one occasion, General Secretary expounded the scientific connotation of Chinese dream, realize the Chinese dream must take the road, carry forward the spirit and cohesion of Chinese forces, gradually formed the China dream, a strategic thought. And practice with the Chinese dream, reflects the history of the new session of the CPC Central Committee, and conforms to the development trend and the people hope, embodies the greatest common divisor and the consensus of Chinese people at home and abroad, inspiring all peoples forging ahead in unity, the spirit of unswervingly follow the road of socialism with Chinese characteristics flags and high melody. This aspects XI General Secretary of speech main including achieved Chinese great revival is Chinese modern yilai most great of dream in 12th session national peoples Congress first times Conference Shang of speech work to dream into really in achieved China dream of vivid practice in the flying youth dream achieved China dream not only benefit people, and benefit world people innovation due its Shi, dream suitable have its potential achieved Chinese great revival is both at home and abroad Chinese children common of dream,. 3. on deepening reform. 18 since the XI General Secretary for the first time to Study on the choice of the Guangdong, unequivocally express the unswervingly follow the road of reform and opening up power determination and courage. Partys 18 session adopted a decision to deepen reform, opened a new journey for deepening the reform in our country. Central has held 22 times full deepening reform led Group Conference, considered through more than 100 more items important reform programme, developed introduced more than 800 over