initial commit

UTC502/24-10-17/TD copy.c

@@ -0,0 +1,59 @@
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+typedef struct student {
+    char nom[10];
+    int note;
+} eleve;
+
+int main() {
+    int fd, i, ret;
+    eleve un_eleve;
+    const char *filename = "students.dat"; // Change the filename as needed
+
+    // Open the file for writing (create if it doesn't exist)
+    fd = open(filename, O_CREAT | O_WRONLY | O_APPEND, S_IRUSR | S_IWUSR);
+    if (fd == -1) {
+        perror("prob open");
+        return 1;
+    }
+
+    // Write student records to the file
+    for (i = 0; i < 4; i++) {
+        printf("Donnez le nom de l’élève \n");
+        scanf("%s", un_eleve.nom);
+        printf("Donnez la note de l’élève \n");
+        scanf("%d", &un_eleve.note);
+        if (write(fd, &un_eleve, sizeof(eleve)) == -1) {
+            perror("prob write");
+            close(fd);
+            return 1;
+        }
+    }
+
+    // Move to the beginning of the file to read records
+    ret = lseek(fd, 0, SEEK_SET);
+    if (ret == -1) {
+        perror("prob lseek");
+        close(fd);
+        return 1;
+    }
+    printf("la nouvelle position est %d\n", ret);
+
+    // Read and display student records
+    for (i = 0; i < 4; i++) {
+        if (read(fd, &un_eleve, sizeof(eleve)) == -1) {
+            perror("prob read");
+            close(fd);
+            return 1;
+        }
+        printf("le nom et la note de l’élève sont %s, %d\n",
+               un_eleve.nom, un_eleve.note);
+    }
+
+    close(fd);
+    return 0;
+}