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Add interation.c recursion.c simple_hash.c binary_search_edge.c binary_search_insertion.c in C codes. (#731)

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* fix(codes/cpp): Memory leak fix: the space was not freed when pop removed the element.

* fix(codes/cpp): Fix access error when printArray(arr, 0)

* Update PrintUtil.hpp

* fix(codes/c): Fix some errors of cmake build

* feat(codes/c): Add hashing_search.c

* styles(codes/c): Modify function description

* styles(codes/c): Modify binary_search.c code style

* fix(codes/c): Fix the problem in binary_tree_bfs.c and the problem that the memory is not released.

* feat: Add preorder_traversal_i_compact.c

* feat(codes/c): Add head_sort.c

* feat(codes/c): Add bucket_sort.c

* feat(codes/c): Add binary_search_edge.c

* fix(codes/c): Add programs that are not managed by cmake (c code)

* feat(codes/c): Add selection_sort.c

* style(codes/c): Change swap in selection_sort.c to `selectionSort`

* styles(codes/c): Change style.

* fix(codes/c): Fix some formatting errors and temporarily remove backtracking chapters

* fix(codes/c): Fix space_complexity.c build error.

* feat(codes/c): Add array_binary_tree.c

* feat(code/c): Update push_back and pop_back in vector.h

* styles(codes/c): Adjust  format.

* feat(codes/c): Add `interation.c ` `recursion.c` `simple_hash.c` `binary_search_edge.c` `binary_search_insertion.c` in C codes.

---------

Co-authored-by: Yudong Jin <krahets@163.com>
This commit is contained in:
gonglja
2023-09-09 19:16:15 +08:00
committed by GitHub
parent fb301b5767
commit 63efe61e56
8 changed files with 346 additions and 3 deletions
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1
codes/c/chapter_hashing/CMakeLists.txt
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@@ -1,2 +1,3 @@
add_executable(array_hash_map array_hash_map.c)
add_executable(simple_hash simple_hash.c)

68
codes/c/chapter_hashing/simple_hash.c Normal file
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@@ -0,0 +1,68 @@
/**
* File: simple_hash.c
* Created Time: 2023-09-09
* Author: Gonglja (glj0@outlook.com)
*/
#include "../utils/common.h"
/* 加法哈希 */
int addHash(char *key) {
long long hash = 0;
const int MODULUS = 1000000007;
for (int i = 0; i < strlen(key); i++) {
hash = (hash + (unsigned char)key[i]) % MODULUS;
}
return (int)hash;
}
/* 乘法哈希 */
int mulHash(char *key) {
long long hash = 0;
const int MODULUS = 1000000007;
for (int i = 0; i < strlen(key); i++) {
hash = (31 * hash + (unsigned char)key[i]) % MODULUS;
}
return (int)hash;
}
/* 异或哈希 */
int xorHash(char *key) {
int hash = 0;
const int MODULUS = 1000000007;
for (int i = 0; i < strlen(key); i++) {
hash ^= (unsigned char)key[i];
}
return hash & MODULUS;
}
/* 旋转哈希 */
int rotHash(char *key) {
long long hash = 0;
const int MODULUS = 1000000007;
for (int i = 0; i < strlen(key); i++) {
hash = ((hash << 4) ^ (hash >> 28) ^ (unsigned char)key[i]) % MODULUS;
}
return (int)hash;
}
/* Driver Code */
int main() {
char *key = "Hello dsad3241241dsa算123法";
int hash = addHash(key);
printf("加法哈希值为 %d\n", hash);
hash = mulHash(key);
printf("乘法哈希值为 %d\n", hash);
hash = xorHash(key);
printf("异或哈希值为 %d\n", hash);
hash = rotHash(key);
printf("旋转哈希值为 %d\n", hash);
return 0;
}