Implement strStr().
Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack.
题目大意：实现一个子串查找函数
[……]
TK-Xiong`s Blog
Code & Algorithm
Code & Algorithm
Implement strStr().
Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack.
题目大意：实现一个子串查找函数
[……]