diff --git a/DEV1.1/TP12:Structures/date.c b/DEV1.1/TP12:Structures/date.c
new file mode 100644
index 0000000..404d5d2
--- /dev/null
+++ b/DEV1.1/TP12:Structures/date.c
@@ -0,0 +1,10 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+int main() {
+	time_t ts=time(NULL);
+	struct tm* date = localtime (&ts);
+	printf("Nous sommes le %d/%d/%d.\n",date->tm_year+1900,date->tm_mon,date->tm_hour);
+return 0;
+}
\ No newline at end of file
diff --git a/DEV1.1/TP12:Structures/groupe.c b/DEV1.1/TP12:Structures/groupe.c
new file mode 100644
index 0000000..666f33e
--- /dev/null
+++ b/DEV1.1/TP12:Structures/groupe.c
@@ -0,0 +1,9 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <grp.h>
+
+int main() {
+	struct group student = getgrnam(etc/group/students22);
+	printf("%s",student.gr_mem);
+return 0;
+}
\ No newline at end of file
diff --git a/DEV1.1/TP12:Structures/tailles.c b/DEV1.1/TP12:Structures/tailles.c
new file mode 100644
index 0000000..8c2f090
--- /dev/null
+++ b/DEV1.1/TP12:Structures/tailles.c
@@ -0,0 +1,14 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+struct enregistrement{
+	char champs1;
+	char champs2;
+	char champs3;
+};
+
+int main() {
+	struct enregistrement bob;
+	printf("%d\n",sizeof bob);
+return 0;
+}
\ No newline at end of file