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BasicKnowledge
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BasicKnowledge
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sequence_search.cpp
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master
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BasicKnowledge
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sequence_search.cpp
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#
include
"
stdafx.h
"
#
include
<
search.h
>
/*
@brief 1、顺序查找
@说明:顺序查找适合于存储结构为顺序存储或链接存储的线性表。
@基本思想
顺序查找也称为线形查找,属于无序查找算法。从数据结构线形表的一端开始,
顺序扫描,依次将扫描到的结点关键字与给定值k相比较,若相等则表示查找成功;
若扫描结束仍没有找到关键字等于k的结点,表示查找失败。
@复杂度分析
查找成功时的平均查找长度为:(假设每个数据元素的概率相等)
ASL = 1/n(1+2+3+…+n) = (n+1)/2 ;
当查找不成功时,需要n+1次比较,时间复杂度为O(n);
所以,顺序查找的时间复杂度为O(n)。
*/
int
SequenceSearch
(
int
a[],
int
value,
int
n)
{
int
i;
for
(i =
0
; i<n; i++)
if
(a[i] == value)
return
i;
return
-
1
;
}
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