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算法技术手册(原书第2 版)
book

算法技术手册(原书第2 版)

by George T.Heineman, Gary Pollice, Stanley Selkow
August 2017
Intermediate to advanced
360 pages
8h 35m
Chinese
China Machine Press
Content preview from 算法技术手册(原书第2 版)
排序算法
59
排序算法
4.2.2 使用环境
插入排序
适用于待排序元素数量较少或者初始数据已经“几乎有序”的情况。至于一个
数组是否“足够小”得能够使用插入排序,这要根据具体的机器和编程语言而定。事实上,
待比较元素的类型也有可能非常重要。
4-3:插入排序在小数据集上的执行过程
4.2.3 决方案
当数据信息以基于指针的形式存储时,我们可以通过传入比较函数
cmp
来对元素进行比
较,例
4-1
中的
C
程序实现了对数组
ar
进行排序。
4-1
:基于指针的插入排序
void sortPointers (void **ar, int n,
int(*cmp)(const void *,const void *)) {
int j;
for (j = 1; j < n; j++) {
  
int i = j-1;
  
void *value = ar[j];
  
while (i >= 0 && cmp(ar[i], value) > 0) {
ar[i+1] = ar[i];
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Publisher Resources

ISBN: 9787111562221