108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
#include "a_station.h"
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#include <stdlib.h>
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#include <string.h>
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// створення станції (у тебе вже добре зроблено)
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struct station* create_station(){
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struct station* station = (struct station*)calloc(1,sizeof(struct station));
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station->tracks = (struct car**)calloc(STATION_SIZE, sizeof(struct car*));
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station->track_count = STATION_SIZE;
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return station;
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}
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// звільнення пам'яті
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void destroy_station(struct station* station){
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for(int i = 0; i < station->track_count; i++){
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struct car* cur = station->tracks[i];
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while(cur != NULL){
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struct car* tmp = cur;
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cur = cur->next;
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free(tmp);
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}
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}
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free(station->tracks);
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free(station);
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}
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// проста хеш-функція
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int select_track(struct station* station, const char* target){
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int sum = 0;
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for(int i = 0; target[i] != '\0'; i++){
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sum += target[i];
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}
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return sum % station->track_count;
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}
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// додавання або оновлення
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void add_target_capacity(struct station* station,const char* target, int capacity){
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int index = select_track(station, target);
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struct car* cur = station->tracks[index];
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// шукаємо існуючий запис
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while(cur != NULL){
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if(strcmp(cur->value, target) == 0){
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cur->capacity += capacity;
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return;
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}
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cur = cur->next;
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}
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// якщо нема — створюємо новий
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struct car* new_car = (struct car*)malloc(sizeof(struct car));
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strcpy(new_car->value, target);
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new_car->capacity = capacity;
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new_car->next = station->tracks[index];
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station->tracks[index] = new_car;
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}
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// отримати капацитет
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int get_target_capacity(struct station* station,const char* target){
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int index = select_track(station, target);
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struct car* cur = station->tracks[index];
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while(cur != NULL){
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if(strcmp(cur->value, target) == 0){
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return cur->capacity;
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}
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cur = cur->next;
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}
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return 0;
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}
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// кількість станцій
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int count_targets(struct station* station){
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int count = 0;
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for(int i = 0; i < station->track_count; i++){
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struct car* cur = station->tracks[i];
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while(cur != NULL){
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count++;
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cur = cur->next;
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}
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}
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return count;
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}
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// загальна кількість пасажирів
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int count_capacity(struct station* station){
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int sum = 0;
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for(int i = 0; i < station->track_count; i++){
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struct car* cur = station->tracks[i];
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while(cur != NULL){
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sum += cur->capacity;
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cur = cur->next;
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}
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}
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return sum;
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} |