59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
#include "a_train.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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struct car* add_car(struct car* first,const char* target) {
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struct car* new = calloc(1, sizeof(struct car));
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if(!new) return first; // copirovanie cielvej stanice
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strcpy(new->value,target);
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if (first==NULL){
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return new; // ak nebolo first, new bude prvy
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}
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struct car* sm = first;
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while(sm->next!=NULL){
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sm = sm->next;
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}
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sm->next = new; // pridavanie vozna na koniec
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return first;
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}
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void print_train(struct car* first) {
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struct car* hlp = first; //pomocna struktura
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while(hlp!=NULL){ // ak je vozen
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printf("Cielova stanica je %s\n",hlp->value); // vypis cielovych stanic voznov
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hlp = hlp->next;
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}
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}
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void cancel_train(struct car* first) {
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if(!first) return;
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cancel_train(first->next); // recursivna funkcia, ktora vymaze uplne vlak
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free(first);
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}
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struct car* clear_train(struct car* first, const char* target) {
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if(!first) return NULL;
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if (strcmp(first->value, target)==0){
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struct car* tmp = first->next;
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free(first);
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return tmp; // vrati to co bolo vymazane ak bol iba jeden vozen
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}
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struct car* hlp = first;
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while (hlp->next!=NULL&&strcmp(hlp->next->value,target)!=0){
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hlp = hlp->next; //hlada vozen
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}
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if (hlp->next!=NULL&&strcmp(hlp->next->value,target)==0){
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struct car* del = hlp->next;
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hlp->next=hlp->next->next; // spoji predchadzajuci a nasledujuci vozen
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free(del); //vymaze vozen
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}
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return first; // link na zaciatok vlaku
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}
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