Add cv6/a_station.c
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							| @ -0,0 +1,95 @@ | |||||||
|  | 
 | ||||||
|  | #include <stdio.h> | ||||||
|  | #include <stdlib.h> | ||||||
|  | #include <string.h> | ||||||
|  | #include "a_station.h" | ||||||
|  | 
 | ||||||
|  | // Функция для создания новой станции
 | ||||||
|  | struct station* create_station() { | ||||||
|  |     struct station* station = calloc(1, sizeof(struct station)); | ||||||
|  |     station->tracks = calloc(STATION_SIZE, sizeof(struct car*)); | ||||||
|  |     station->track_count = STATION_SIZE; | ||||||
|  |     return station; | ||||||
|  | } | ||||||
|  | 
 | ||||||
|  | // Функция для вычисления индекса колеи на основе названия станции
 | ||||||
|  | int select_track(struct station* station, const char* target) { | ||||||
|  |     int hash = 0; | ||||||
|  |     while (*target) { | ||||||
|  |         hash += (unsigned char)(*target++); | ||||||
|  |     } | ||||||
|  |     return hash % station->track_count; | ||||||
|  | } | ||||||
|  | 
 | ||||||
|  | // Функция для добавления записи о вместимости станции
 | ||||||
|  | void add_target_capacity(struct station* station, const char* target, int capacity) { | ||||||
|  |     int track = select_track(station, target); | ||||||
|  |     struct car* current = station->tracks[track]; | ||||||
|  |     struct car* prev = NULL; | ||||||
|  | 
 | ||||||
|  |     // Поиск станции в цепочке
 | ||||||
|  |     while (current != NULL) { | ||||||
|  |         if (strcmp(current->value, target) == 0) { | ||||||
|  |             current->capacity += capacity;  // Обновляем вместимость
 | ||||||
|  |             return; | ||||||
|  |         } | ||||||
|  |         prev = current; | ||||||
|  |         current = current->next; | ||||||
|  |     } | ||||||
|  | 
 | ||||||
|  |     // Если станции не существует, создаем новый элемент
 | ||||||
|  |     struct car* new_car = malloc(sizeof(struct car)); | ||||||
|  |     new_car->capacity = capacity; | ||||||
|  |     strcpy(new_car->value, target); | ||||||
|  |     new_car->next = NULL; | ||||||
|  | 
 | ||||||
|  |     // Добавляем новый элемент в цепочку
 | ||||||
|  |     if (prev == NULL) { | ||||||
|  |         station->tracks[track] = new_car; | ||||||
|  |     } else { | ||||||
|  |         prev->next = new_car; | ||||||
|  |     } | ||||||
|  | } | ||||||
|  | 
 | ||||||
|  | // Функция для поиска вместимости станции по названию
 | ||||||
|  | int find_capacity(struct station* station, const char* target) { | ||||||
|  |     int track = select_track(station, target); | ||||||
|  |     struct car* current = station->tracks[track]; | ||||||
|  | 
 | ||||||
|  |     // Поиск элемента в цепочке
 | ||||||
|  |     while (current != NULL) { | ||||||
|  |         if (strcmp(current->value, target) == 0) { | ||||||
|  |             return current->capacity; | ||||||
|  |         } | ||||||
|  |         current = current->next; | ||||||
|  |     } | ||||||
|  |     return -1;  // Если станция не найдена, возвращаем -1
 | ||||||
|  | } | ||||||
|  | 
 | ||||||
|  | // Функция для освобождения памяти, выделенной для станции
 | ||||||
|  | void destroy_station(struct station* station) { | ||||||
|  |     for (int i = 0; i < station->track_count; i++) { | ||||||
|  |         struct car* current = station->tracks[i]; | ||||||
|  |         while (current != NULL) { | ||||||
|  |             struct car* temp = current; | ||||||
|  |             current = current->next; | ||||||
|  |             free(temp); | ||||||
|  |         } | ||||||
|  |     } | ||||||
|  |     free(station->tracks); | ||||||
|  |     free(station); | ||||||
|  | } | ||||||
|  | 
 | ||||||
|  | // Функция для вывода информации о станции
 | ||||||
|  | void print_station(struct station* station) { | ||||||
|  |     printf("station>>>\n"); | ||||||
|  |     for (int i = 0; i < station->track_count; i++) { | ||||||
|  |         struct car* current = station->tracks[i]; | ||||||
|  |         while (current != NULL) { | ||||||
|  |             printf("%s %d -> ", current->value, current->capacity); | ||||||
|  |             current = current->next; | ||||||
|  |         } | ||||||
|  |         printf("NULL\n"); | ||||||
|  |     } | ||||||
|  |     printf("<<<station\n"); | ||||||
|  | } | ||||||
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