99 lines
1.6 KiB
C
99 lines
1.6 KiB
C
#include <stdio.h>
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#include"a_train.h"
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/////@
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struct car* add_car(struct car* first,const char* target)
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{
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struct car* nc=(struct car*) malloc(sizeof(struct car));
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strcpy(nc->value, target);
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nc->next=NULL;
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if(first)
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{
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while(first->next!=NULL)
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{
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first=first->next;
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}
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first->next=nc;
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return first;
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}
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first=nc;
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return first;
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}
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void print_train(struct car* first)
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{
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if(first==NULL)
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{
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return;
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}
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do
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{
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printf("%s", first->value);
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first=first->next;
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if(first){
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printf("->");
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}
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}while(first!=NULL);
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}
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void cancel_train(struct car* first)
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{
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struct car* t;
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while(first!=NULL)
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{
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t=first;
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first=first->next;
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free(t);
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}
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}
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struct car* clear_train(struct car* first, const char* target)
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{
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struct car* t; //змінна для збереження кого видаляти
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if(first==NULL || target==NULL)
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{
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return first;
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}
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//голова == таргет - видаляємо лише перший
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while(strcmp(first->value, target)==0) //поки рядки однакові
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{
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t=first;
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first=first->next;
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free(t);
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if(first==NULL)
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{
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return NULL;
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}
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}
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//голова не таргет
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do
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{
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if(strcmp(first->next->value, target)==0)
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{
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t=first;
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first=first->next;
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free(t);
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}
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else
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{
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first=first->next;
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}
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}
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while(first);
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return first;
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}
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