Implement strStr()
mplement strStr().
Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack.
int strStr(char *haystack, char *needle) { if(haystack == NULL) return -1; if(needle == NULL) return 0; if(strlen(needle) > strlen(haystack)) return -1; int i,j; for(i = 0; i<=strlen(haystack)-strlen(needle); i++){ for(j = 0; j<strlen(needle); j++) if(haystack[i+j] != needle[j]){ break; } if(j == strlen(needle)) return i; } return -1; }