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Implement strStr().
Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack.
Update (2014-11-02):
The signature of the function had been updated to return the index instead of the pointer. If you still see your function signature returns a char * or String, please click the reload button to reset your code definition.
class Solution { public: int strStr(char *haystack, char *needle) { if(haystack==NULL||needle==NULL)return -1; int len1=strlen(haystack); int len2=strlen(needle); if(len1<len2)return -1; int i=0; for(;i<(len1-len2+1);i++) { int j=0; for(;j<len2;j++) { if(haystack[i+j]!=needle[j]) break; } if(j==len2)return i; } return -1; } };
leetcode[28]Implement strStr()
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原文地址：http://www.cnblogs.com/Vae98Scilence/p/4283630.html
