How to implement the strStr () function

Today, I will talk to you about how to achieve the strStr () function, many people may not know much about it. In order to make you understand better, the editor has summarized the following for you. I hope you can get something according to this article.

Implement the strstro function.

Enter a huhuk word payment order and a meedo student payment order, and find out in the h word payment order that the first bit weight of the eed payment order starts with 0, if you save

If yes, return-1.

Example 1:

Enter: haystack "helto", needle- "iu"'

Output: 2

Example 2:

Enter: haystack "aaaaa" edle "bba"

Output:-1

Description:

What value should we return when needle is an empty string? This is a good question in the interview.

For this question, we should return 0. 0 when peedte is an empty list. This is special to ststr of C language and mndexor0 of Jva.

Violent matching

Class Solution {public int strStr (String haystack, String needle) {int sLen = haystack.length (); / / main string int pLen = needle.length (); / / the length of the pattern string / / the number of times for (int item0) needs to be matched