71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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typedef struct maillon_s {
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char valeur;
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struct maillon_s* suivant;
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} maillon;
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typedef struct {
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maillon* tete;
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maillon* queue;
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} file;
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void enqueue_file(file* f, char valeur) {
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maillon* nouveau = (maillon*)malloc(sizeof(maillon));
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if (nouveau == NULL) {
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printf("Erreur: allocation memoire\n");
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exit(EXIT_FAILURE);
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}
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nouveau->valeur = valeur;
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nouveau->suivant = NULL;
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if (f->queue == NULL) {
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f->tete = f->queue = nouveau;
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} else {
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f->queue->suivant = nouveau;
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f->queue = nouveau;
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}
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}
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char dequeue_file(file* f) {
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if (f->tete == NULL) {
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printf("Erreur: file vide\n");
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return '\0';
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}
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maillon* temp = f->tete;
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char valeur = temp->valeur;
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f->tete = f->tete->suivant;
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if (f->tete == NULL) {
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f->queue = NULL;
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}
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free(temp);
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return valeur;
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}
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int empty_file(file* f) {
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return f->tete == NULL;
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}
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int main(void) {
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file f = {NULL, NULL};
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char ordre[2];
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printf("La file attend vos ordres \n > ");
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while (scanf("%1s", ordre) == 1) {
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if (ordre[0] == 'q') {
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printf("Au revoir\n");
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break;
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} else if (ordre[0] == '+') {
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scanf(" %c", &ordre[1]);
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enqueue_file(&f, ordre[1]);
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} else if (ordre[0] == '-') {
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printf("Dequeue: %c\n", dequeue_file(&f));
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} else {
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printf("Commande invalide\n");
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}
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printf("\nLa file attend vos ordres \n > ");
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}
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return EXIT_SUCCESS;
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}
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