refactor: Re-implement hanota.c (#885)

* feat: re-impl hanota.c

* chore: Remove useless comment code

* Update hanota.c

* Update hanota.c

* Update print_util.h

* Update CMakeLists.txt

---------

Co-authored-by: Yudong Jin <krahets@163.com>

codes/c/CMakeLists.txt

@@ -8,11 +8,13 @@ include_directories(./include)
 add_subdirectory(chapter_computational_complexity)
 add_subdirectory(chapter_array_and_linkedlist)
 add_subdirectory(chapter_stack_and_queue)
-add_subdirectory(chapter_heap)
 add_subdirectory(chapter_hashing)
 add_subdirectory(chapter_tree)
+add_subdirectory(chapter_heap)
 add_subdirectory(chapter_graph)
 add_subdirectory(chapter_searching)
 add_subdirectory(chapter_sorting)
+add_subdirectory(chapter_divide_and_conquer)
 add_subdirectory(chapter_backtracking)
+add_subdirectory(chapter_dynamic_programming)
 add_subdirectory(chapter_greedy)

codes/c/chapter_divide_and_conquer/hanota.c

@@ -1,82 +1,74 @@
 /**
  * File: hanota.c
  * Created Time: 2023-10-01
- * Author: Zuoxun (845242523@qq.com)
+ * Author: Zuoxun (845242523@qq.com), lucas(superrat6@gmail.com)
  */
 
 #include "../utils/common.h"
 
+// 假设最多有 1000 个排列
+#define MAX_SIZE 1000
+
 /* 移动一个圆盘 */
-void move(vector *src, vector *tar) {
+void move(int *src, int *srcSize, int *tar, int *tarSize) {
     // 从 src 顶部拿出一个圆盘
-    int *panTemp = vectorBack(src);
-    int *pan = malloc(sizeof(int));
-    *pan = *panTemp;
-    vectorPopback(src);
+    int pan = src[*srcSize - 1];
+    src[*srcSize - 1] = 0;
+    (*srcSize)--;
     // 将圆盘放入 tar 顶部
-    vectorPushback(tar, pan, sizeof(int));
+    tar[*tarSize] = pan;
+    (*tarSize)++;
 }
 
 /* 求解汉诺塔：问题 f(i) */
-void dfs(int i, vector *src, vector *buf, vector *tar) {
+void dfs(int i, int *src, int *srcSize, int *buf, int *bufSize, int *tar, int *tarSize) {
     // 若 src 只剩下一个圆盘，则直接将其移到 tar
     if (i == 1) {
-        move(src, tar);
+        move(src, srcSize, tar, tarSize);
         return;
     }
     // 子问题 f(i-1) ：将 src 顶部 i-1 个圆盘借助 tar 移到 buf
-    dfs(i - 1, src, tar, buf);
+    dfs(i - 1, src, srcSize, tar, tarSize, buf, bufSize);
     // 子问题 f(1) ：将 src 剩余一个圆盘移到 tar
-    move(src, tar);
+    move(src, srcSize, tar, tarSize);
     // 子问题 f(i-1) ：将 buf 顶部 i-1 个圆盘借助 src 移到 tar
-    dfs(i - 1, buf, src, tar);
+    dfs(i - 1, buf, bufSize, src, srcSize, tar, tarSize);
 }
 
 /* 求解汉诺塔 */
-void solveHanota(vector *A, vector *B, vector *C) {
-    int n = A->size;
+void solveHanota(int *A, int *ASize, int *B, int *BSize, int *C, int *CSize) {
     // 将 A 顶部 n 个圆盘借助 B 移到 C
-    dfs(n, A, B, C);
-}
-
-/* 打印向量中的元素 */
-void printFunc(vector *v, void *p) {
-    int *node = p;
-    printf("%d", *node);
+    dfs(*ASize, A, ASize, B, BSize, C, CSize);
 }
 
 /* Driver Code */
 int main() {
     // 列表尾部是柱子顶部
     int a[] = {5, 4, 3, 2, 1};
-    vector *A = newVector(); // int
-    vector *B = newVector(); // int
-    vector *C = newVector(); // int
-    for (int i = 0; i < sizeof(a) / sizeof(a[0]); i++) {
-        vectorPushback(A, &a[i], sizeof(int));
-    }
+    int b[MAX_SIZE] = {0};
+    int c[MAX_SIZE] = {0};
 
-    printf("初始状态下：\n");
-    printf("A =");
-    printVector(A, printFunc);
-    printf("B =");
-    printVector(B, printFunc);
-    printf("C =");
-    printVector(C, printFunc);
+    int ASize = sizeof(a) / sizeof(a[0]);
+    int BSize = 0;
+    int CSize = 0;
 
-    solveHanota(A, B, C);
+    printf("\n初始状态下：");
+    printf("\nA = ");
+    printArray(a, ASize);
+    printf("B = ");
+    printArray(b, BSize);
+    printf("C = ");
+    printArray(c, CSize);
 
-    printf("圆盘移动完成后：\n");
-    printf("A =");
-    printVector(A, printFunc);
-    printf("B =");
-    printVector(B, printFunc);
-    printf("C =");
-    printVector(C, printFunc);
+    solveHanota(a, &ASize, b, &BSize, c, &CSize);
+
+    printf("\n圆盘移动完成后：");
+    printf("A = ");
+    printArray(a, ASize);
+    printf("B = ");
+    printArray(b, BSize);
+    printf("C = ");
+    printArray(c, CSize);
 
-    // 释放内存
-    delVector(A);
-    delVector(B);
-    delVector(C);
     return 0;
 }

codes/c/utils/print_util.h

@@ -35,7 +35,7 @@ static void printArray(int arr[], int size) {
             printf("NULL]\n");
         }
     } else {
-        printf("]");
+        printf("]\n");
     }
 }