82 lines
1.6 KiB
C
82 lines
1.6 KiB
C
#include "a_train.h"
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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struct car* add_car(struct car* first,const char* target) {
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if(first == NULL){
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first = calloc(1, sizeof(struct car));
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strcpy(first->value, target);
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return first;
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}
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struct car* temp = first;
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while(temp->next){
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temp = temp->next;
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}
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struct car* newCar = (struct car*)calloc(1, sizeof(struct car));
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strcpy(newCar->value, target);
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temp->next = newCar;
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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* temp = first;
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while(temp){
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printf("%s\n", temp->value);
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temp = temp->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 == NULL){
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return;
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}
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cancel_train(first->next);
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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 == NULL){
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return NULL;
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}
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if (first->next == NULL && strcmp(first->value, target) == 0)
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{
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free(first);
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return NULL;
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}
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else if(first->next == NULL && strcmp(first->value, target) != 0){
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return first;
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}
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if(first->next->next == NULL && strcmp(first->value, target) == 0){
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struct car* temp = first;
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first = first->next;
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first->next = NULL;
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free(temp);
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return first;
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}
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struct car* prev= NULL;
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struct car* temp = first;
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while (temp->next)
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{
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prev = temp;
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temp = temp->next;
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if(strcmp(temp->value, target) == 0){
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prev->next = temp->next;
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temp = prev->next;
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}
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}
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return first;
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}
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