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