For the purpose of this problem, we will return 0 when needle is an empty string. This is consistent to C’sstrstr() and Java’sindexOf(). strStr() implementation in C++ The implementation should consider the corner cases, when the needle is empty, the result should be always 0. The ...
// C program to implement own strstr() function #include <stdio.h> #include <string.h> char* StrStr(char* str, char* substr) { static char* ptr; ptr = str; while (*ptr) { if (strncmp(ptr, substr, strlen(substr)) == 0) return ptr; ptr++; } return NULL; } int main() {...
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...
Returns a pointer to the first occurrence of needle in haystack, ornullif needle is not part of haystack. Anwser 1:O(n*m) class Solution { public: char *strStr(char *haystack, char *needle) { // Start typing your C/C++ solution below // DO NOT write int main() function int haylen...
classSolution {public:char*strStr(char*haystack,char*needle) {//Start typing your C/C++ solution below//DO NOT write int main() functionintlena =strlen(haystack);intlenb =strlen(needle);if(lena <lenb)returnNULL;if(lena ==lenb) {if(strcmp(haystack, needle)==0)returnhaystack;returnNULL; ...
char *strStr(char *haystack, char *needle) { // Start typing your C/C++ solution below // DO NOT write int main() function int haylen = strlen(haystack); int needlen = strlen(needle); int* fail = new int[needlen]; memset(fail, -1, needlen * sizeof(int)); // strlen(fail) ...
Implement strStr() Returns a pointer to the first occurrence of needle in haystack, ornullif needle is not part of haystack. 如果当前不是子串则回溯。时间复杂度是O(mn)。 1publicclassSolution {2publicString strStr(String haystack, String needle) {3//Note: The Solution object is instantiated ...
// 答案一 var strStr = function(haystack, needle) { return haystack.indexOf(needle) }; //答案二 var strStr = function(haystack, needle) { if (needle === '') return 0; const split = haystack.split(needle); return split.length > 1 ? split[0].length : -1; }; // 答案三 var ...
Write an efficient program to implement strstr function in C. The strstr() function returns a pointer to the first occurrence of a string in another string. The prototype of the strstr() is: const char* strstr(const char* X, const char* Y); 1. Iterative Implementation Following’s ...
Implement strstr() function in C (Iterative & Recursive) Implement strncat() function in C Rate this post Submit Rating Average rating5/5. Vote count:10 Submit Feedback Thanks for reading. To share your code in the comments, please use ouronline compilerthat supports C, C++, Java, Python,...