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https://github.com/krahets/hello-algo.git
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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>
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492a69ebca
commit
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3 changed files with 42 additions and 48 deletions
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@ -8,11 +8,13 @@ include_directories(./include)
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add_subdirectory(chapter_computational_complexity)
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add_subdirectory(chapter_computational_complexity)
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add_subdirectory(chapter_array_and_linkedlist)
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add_subdirectory(chapter_array_and_linkedlist)
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add_subdirectory(chapter_stack_and_queue)
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add_subdirectory(chapter_stack_and_queue)
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add_subdirectory(chapter_heap)
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add_subdirectory(chapter_hashing)
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add_subdirectory(chapter_hashing)
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add_subdirectory(chapter_tree)
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add_subdirectory(chapter_tree)
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add_subdirectory(chapter_heap)
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add_subdirectory(chapter_graph)
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add_subdirectory(chapter_graph)
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add_subdirectory(chapter_searching)
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add_subdirectory(chapter_searching)
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add_subdirectory(chapter_sorting)
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add_subdirectory(chapter_sorting)
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add_subdirectory(chapter_divide_and_conquer)
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add_subdirectory(chapter_backtracking)
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add_subdirectory(chapter_backtracking)
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add_subdirectory(chapter_dynamic_programming)
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add_subdirectory(chapter_greedy)
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add_subdirectory(chapter_greedy)
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@ -1,82 +1,74 @@
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/**
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/**
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* File: hanota.c
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* File: hanota.c
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* Created Time: 2023-10-01
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* Created Time: 2023-10-01
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* Author: Zuoxun (845242523@qq.com)
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* Author: Zuoxun (845242523@qq.com), lucas(superrat6@gmail.com)
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*/
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*/
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#include "../utils/common.h"
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#include "../utils/common.h"
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// 假设最多有 1000 个排列
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#define MAX_SIZE 1000
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/* 移动一个圆盘 */
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/* 移动一个圆盘 */
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void move(vector *src, vector *tar) {
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void move(int *src, int *srcSize, int *tar, int *tarSize) {
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// 从 src 顶部拿出一个圆盘
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// 从 src 顶部拿出一个圆盘
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int *panTemp = vectorBack(src);
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int pan = src[*srcSize - 1];
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int *pan = malloc(sizeof(int));
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src[*srcSize - 1] = 0;
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*pan = *panTemp;
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(*srcSize)--;
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vectorPopback(src);
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// 将圆盘放入 tar 顶部
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// 将圆盘放入 tar 顶部
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vectorPushback(tar, pan, sizeof(int));
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tar[*tarSize] = pan;
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(*tarSize)++;
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}
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}
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/* 求解汉诺塔:问题 f(i) */
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/* 求解汉诺塔:问题 f(i) */
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void dfs(int i, vector *src, vector *buf, vector *tar) {
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void dfs(int i, int *src, int *srcSize, int *buf, int *bufSize, int *tar, int *tarSize) {
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// 若 src 只剩下一个圆盘,则直接将其移到 tar
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// 若 src 只剩下一个圆盘,则直接将其移到 tar
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if (i == 1) {
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if (i == 1) {
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move(src, tar);
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move(src, srcSize, tar, tarSize);
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return;
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return;
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}
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}
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// 子问题 f(i-1) :将 src 顶部 i-1 个圆盘借助 tar 移到 buf
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// 子问题 f(i-1) :将 src 顶部 i-1 个圆盘借助 tar 移到 buf
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dfs(i - 1, src, tar, buf);
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dfs(i - 1, src, srcSize, tar, tarSize, buf, bufSize);
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// 子问题 f(1) :将 src 剩余一个圆盘移到 tar
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// 子问题 f(1) :将 src 剩余一个圆盘移到 tar
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move(src, tar);
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move(src, srcSize, tar, tarSize);
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// 子问题 f(i-1) :将 buf 顶部 i-1 个圆盘借助 src 移到 tar
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// 子问题 f(i-1) :将 buf 顶部 i-1 个圆盘借助 src 移到 tar
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dfs(i - 1, buf, src, tar);
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dfs(i - 1, buf, bufSize, src, srcSize, tar, tarSize);
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}
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}
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/* 求解汉诺塔 */
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/* 求解汉诺塔 */
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void solveHanota(vector *A, vector *B, vector *C) {
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void solveHanota(int *A, int *ASize, int *B, int *BSize, int *C, int *CSize) {
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int n = A->size;
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// 将 A 顶部 n 个圆盘借助 B 移到 C
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// 将 A 顶部 n 个圆盘借助 B 移到 C
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dfs(n, A, B, C);
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dfs(*ASize, A, ASize, B, BSize, C, CSize);
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}
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/* 打印向量中的元素 */
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void printFunc(vector *v, void *p) {
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int *node = p;
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printf("%d", *node);
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}
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}
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/* Driver Code */
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/* Driver Code */
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int main() {
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int main() {
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// 列表尾部是柱子顶部
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// 列表尾部是柱子顶部
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int a[] = {5, 4, 3, 2, 1};
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int a[] = {5, 4, 3, 2, 1};
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vector *A = newVector(); // int
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int b[MAX_SIZE] = {0};
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vector *B = newVector(); // int
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int c[MAX_SIZE] = {0};
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vector *C = newVector(); // int
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for (int i = 0; i < sizeof(a) / sizeof(a[0]); i++) {
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vectorPushback(A, &a[i], sizeof(int));
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}
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printf("初始状态下:\n");
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int ASize = sizeof(a) / sizeof(a[0]);
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printf("A =");
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int BSize = 0;
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printVector(A, printFunc);
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int CSize = 0;
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printf("B =");
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printVector(B, printFunc);
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printf("C =");
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printVector(C, printFunc);
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solveHanota(A, B, C);
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printf("\n初始状态下:");
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printf("\nA = ");
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printArray(a, ASize);
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printf("B = ");
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printArray(b, BSize);
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printf("C = ");
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printArray(c, CSize);
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printf("圆盘移动完成后:\n");
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solveHanota(a, &ASize, b, &BSize, c, &CSize);
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printf("A =");
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printVector(A, printFunc);
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printf("\n圆盘移动完成后:");
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printf("B =");
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printf("A = ");
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printVector(B, printFunc);
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printArray(a, ASize);
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printf("C =");
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printf("B = ");
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printVector(C, printFunc);
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printArray(b, BSize);
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printf("C = ");
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printArray(c, CSize);
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// 释放内存
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delVector(A);
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delVector(B);
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delVector(C);
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return 0;
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return 0;
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}
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}
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@ -35,7 +35,7 @@ static void printArray(int arr[], int size) {
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printf("NULL]\n");
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printf("NULL]\n");
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}
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}
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} else {
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} else {
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printf("]");
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printf("]\n");
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}
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}
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}
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}
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