du6

du6/program.c

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