LeetCode28. Implement strStr()
题目:
Implement strStr().
Return the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack.
Example 1:
Input: haystack = "hello", needle = "ll" Output: 2
Example 2:
Input: haystack = "aaaaa", needle = "bba" Output: -1
题目分析:直接用string的find函数
代码:
class Solution { public: int strStr(string haystack, string needle) { int tmp = haystack.find(needle); if (tmp == string::npos) return -1; return tmp; } };