diff --git a/APL1.1/TP04/bissextile.c b/APL1.1/TP04/bissextile.c
new file mode 100644
index 0000000..9c538db
--- /dev/null
+++ b/APL1.1/TP04/bissextile.c
@@ -0,0 +1,23 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+#define ANNEE 100
+
+bool bissextile(int ann) {
+	if (((ann % 4 == 0) && (ann %  100 != 0)) || (ann % 400 == 0)) {
+		return true;
+	}
+
+	return false;
+}
+
+int main(void) {
+	if (bissextile(ANNEE)) {
+		printf("L'année %d est bissextile.\n", ANNEE);
+	} else {
+		printf("L'année %d n'est pas bissextile.\n", ANNEE);
+	}
+
+	return EXIT_SUCCESS;
+}
diff --git a/APL1.1/TP04/bissextile_no_if.c b/APL1.1/TP04/bissextile_no_if.c
new file mode 100644
index 0000000..fa2727f
--- /dev/null
+++ b/APL1.1/TP04/bissextile_no_if.c
@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#define ANNEE 400
+
+int main(void) {
+	int div_100 = ANNEE % 100 == 0;
+	int div_4 = ANNEE % 4 == 0;
+	int div_400 = ANNEE % 400 == 0;
+
+	int index = div_100 * 4 + div_4 * 2 + div_400 * 1;
+
+	printf("Année %d bissextile : %d.\n", ANNEE, index != 4);
+
+	return EXIT_SUCCESS;
+}
diff --git a/APL1.1/TP04/comparaisons.c b/APL1.1/TP04/comparaisons.c
new file mode 100644
index 0000000..be69140
--- /dev/null
+++ b/APL1.1/TP04/comparaisons.c
@@ -0,0 +1,14 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(void) {
+	int a = 7;
+	int b = 4;
+
+	printf("%d > %d : %d\n", a, b, a > b);
+	printf("%d < %d : %d\n", a, b, a < b);
+	printf("%d >= %d : %d\n", a, b, a >= b);
+	printf("%d <= %d : %d\n", a, b, a <= b);
+	printf("%d == %d : %d\n", a, b, a == b);
+	printf("%d != %d : %d\n", a, b, a != b);
+}
diff --git a/APL1.1/TP04/conditions.c b/APL1.1/TP04/conditions.c
new file mode 100644
index 0000000..dcd05bd
--- /dev/null
+++ b/APL1.1/TP04/conditions.c
@@ -0,0 +1,19 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(void) {
+	int x = 3;
+	if (x = 2) {
+		printf("x vaut 2\n");
+	} else {
+		printf("x est different de 2\n");
+	}
+	printf("la valeur de x est en fait %d\n", x);
+	if (x = 0) {
+		printf("x vaut 0\n");
+	} else {
+		printf("%s", "x est different de 0\n");
+	}
+	printf("la valeur de x est en fait %d\n", x);
+	return EXIT_SUCCESS;
+}