Counting6Homework

counting/counting.sln

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+EndProject
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+		{00B45251-5170-4B6C-A07F-686FF11AE05B}.Release|x64.Build.0 = Release|x64
+		{00B45251-5170-4B6C-A07F-686FF11AE05B}.Release|x86.ActiveCfg = Release|Win32
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counting/counting/counting.vcxproj

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+    <ClCompile Include="list.c" />
+    <ClCompile Include="main.c" />
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counting/counting/counting.vcxproj.filters

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Исходные файлы">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;c++;cppm;ixx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+    <Filter Include="Файлы заголовков">
+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
+      <Extensions>h;hh;hpp;hxx;h++;hm;inl;inc;ipp;xsd</Extensions>
+    </Filter>
+    <Filter Include="Файлы ресурсов">
+      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
+    </Filter>
+  </ItemGroup>
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+    <ClCompile Include="list.c">
+      <Filter>Исходные файлы</Filter>
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+    <ClCompile Include="main.c">
+      <Filter>Исходные файлы</Filter>
+    </ClCompile>
+  </ItemGroup>
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+    <ClInclude Include="list.h">
+      <Filter>Исходные файлы</Filter>
+    </ClInclude>
+  </ItemGroup>
+</Project>

counting/counting/list.c

@@ -0,0 +1,99 @@
+#include "list.h"
+#include <stdbool.h>
+#include <string.h>
+
+typedef struct Node {
+    int startPosition;
+    struct Node* next;
+} Node;
+
+struct List {
+    Node* head;
+};
+
+bool isEmpty(List* list) {
+    return list->head == NULL;
+}
+
+int top(List* list) {
+    if (list->head == NULL) {
+        return -1;
+    }
+    return list->head->startPosition;
+}
+
+// ������� ������, ��������� ������
+
+void addPositions(List* list, int size) {
+    int i = 0;
+    Node* walker = list->head;
+    while (i < size) {
+        Node* newNode = calloc(1, sizeof(Node));
+        if (newNode == NULL) {
+            clearList(&list);
+            return NULL;
+        }
+
+        newNode->startPosition = i;
+
+        if (list->head != NULL) {
+            newNode->next = list->head;
+            walker->next = newNode;
+            walker = walker->next;
+        } else {
+            list->head = newNode;
+            list->head->next = list->head;
+            walker = list->head;
+        }
+        ++i;
+    }
+}
+
+List* createList(void) {
+    List* list = calloc(1, sizeof(List));
+    return list;
+}
+
+int counting(List** list, int size, int step) {
+    int newStep = step % size;
+    Node* walker = (*list)->head;
+    int i = 0;
+    Node* walkerNewNext = NULL;
+    while ((*list)->head != NULL && (*list)->head->next != (*list)->head) {
+        int i = 0;
+        while (i < newStep - 2) {
+            walker = walker->next;
+            ++i;
+        }
+        if (walker->next == NULL || walker->next->next == NULL) {
+            clearList(list);
+            return -1;
+        }
+        walkerNewNext = walker->next->next;
+        if ((*list)->head == walker->next) {
+            (*list)->head = walkerNewNext;
+        }
+        free(walker->next);
+        walker->next = walkerNewNext;
+    }
+    if ((*list)->head == NULL) {
+        free(*list);
+        return -1;
+    }
+    int result = (*list)->head->startPosition;
+    free((*list)->head);
+    free(*list);
+    *list = NULL;
+    return result;
+}
+
+void clearList(List** list) {
+    while ((*list)->head != (*list)->head->next) {
+        Node* prevWalker = (*list)->head;
+        (*list)->head = (*list)->head->next;
+        free(prevWalker);
+    }
+    free((*list)->head);
+    free(*list);
+    *list = NULL;
+}

counting/counting/list.h

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+#pragma once
+#include <stdbool.h>
+#include <stdlib.h>
+
+typedef struct List List;
+
+bool isEmpty(List* list);
+
+List* createList(void);
+
+int top(List* list);
+
+void addPositions(List* list, int size);
+
+int counting(List** list, int size, int step);
+
+void clearList(List** list);