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station

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This commit is contained in:
Maryna Kravtsova 2020-11-07 16:46:07 +01:00
parent e54978ce91
commit 12a7f384a7
1 changed files with 27 additions and 11 deletions
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38
cv6/a_station.c
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@ -11,6 +11,7 @@ struct station* create_station(){
void destroy_station(struct station* station){
for(int i = 0; i < station->track_count; i++){
//get one linked list from station
struct car* this = station->tracks[i];
while(this != NULL){
struct car* delete = this;
@ -26,42 +27,55 @@ void destroy_station(struct station* station){
int select_track(struct station* station, const char* target){
unsigned int hash = 0;
for(int i = 0; target[i] != '\0'; i++){
hash = target[i] + (hash << 6) + (hash << 16) - hash;
hash += target[i];
//hash = target[i] + (hash << 6) + (hash << 16) - hash;
}
if(hash < 0 || hash > station->track_count){
//if(hash < 0 || hash > station->track_count){
hash = hash % station->track_count;
}
//}
return hash;
}
void add_target_capacity(struct station* station,const char* target, int capacity){
//find hash
int track = select_track(station, target);
//get right linked list(with help of hash)
struct car* start = station->tracks[track];
while(start != NULL){
int x = strcmp(start->value, target);
//if the "wagon" track is similar to the target, then increment capacity
if(x == 0){
start->capacity = start->capacity + capacity;
return;
}
start = start->next;
}
struct car* newcar = calloc(1, sizeof(struct car));
strcpy(newcar->value, target);
newcar->capacity = capacity;
newcar->next = start;
station->tracks[track] = newcar;
if(newcar->next){
return;
//if track is empty, create new "wagon"
if(station->track[track] == NULL){
struct car* new = calloc(1, sizeof(struct car));
strcpy(new->value, target);
new->capacity = capacity;
new->next = start;
station->tracks[track] = new;
/*if(new->next){
return;
}*/
}
return;
}
int get_target_capacity(struct station* station,const char* target){
//find hash
int track = select_track(station, target);
//get right linked list
struct car* start = station->tracks[track];
while(start != NULL){
int x = strcmp(start->value, target);
//if the target is similar to "wagon", than get the capacity
if(x == 0){
return start->capacity;
}
@ -70,6 +84,7 @@ int get_target_capacity(struct station* station,const char* target){
return 0;
}
//count all tracks
int count_targets(struct station* station){
int targets = 0;
for(int i = 0; i < STATION_SIZE; i++){
@ -79,10 +94,11 @@ int count_targets(struct station* station){
}
return targets;
}
//count capacity in all tracks
int count_capacity(struct station* station){
int capacity = 0;
for(int i = 0; i < STATION_SIZE; i++){
//get one linked list and count there capacity
struct car* this = station->tracks[i];
if(this != NULL){
capacity = capacity + this->capacity;