Guillaume-Sanchez
49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
/****************************************************************/
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/* Exemple de manipulation d’un fichier: */
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/* création, positionnement, fermeture */
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/****************************************************************/
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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typedef struct student
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{
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char nom[10];
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int note;
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} eleve;
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int main()
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{
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int fd, i, ret;
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eleve un_eleve;
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fd = open("./eleves.txt", O_CREAT | O_TRUNC | O_RDWR , S_IRUSR | S_IRGRP);
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if (fd == -1)
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perror("prob open");
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i = 0;
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while (i < 4)
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{
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printf("Donnez le nom de l’élève \n");
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scanf("%s", un_eleve.nom);
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printf("Donnez la note de l’élève \n");
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scanf("%d", &un_eleve.note);
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write(fd, &un_eleve, sizeof(eleve));
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i = i + 1;
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}
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ret = lseek(fd, SEEK_SET, 0);
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if (ret == -1)
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perror("prob lseek");
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printf("la nouvelle position est %d\n", ret);
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i = 0;
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while (i < 4)
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{
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read(fd, &un_eleve, sizeof(eleve));
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printf("le nom et la note de l’élève sont %s, %d\n",
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un_eleve.nom,
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un_eleve.note);
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i = i + 1;
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}
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close(fd);
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return 0;
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} |