diff --git a/tp7/exo7.c b/tp7/exo7.c
new file mode 100644
index 0000000..e86e162
--- /dev/null
+++ b/tp7/exo7.c
@@ -0,0 +1,21 @@
+#include <stdbool.h>
+#include <stdlib.h>
+
+// Pile with size at index 0
+int* creer_pileb(int capacite) {
+    int* b = malloc((capacite+1)*sizeof(int));
+    b[0] = 0;
+    return b;
+}
+// User must make sure that the size isn't bigger than capacity
+void empiler_pileb(int* p, int x) {
+    p[p[0]+1] = x;
+    p[0]++;
+}
+int depiler_pileb(int* p) {
+    p[0]--;
+    return p[p[0]+1];
+}
+bool est_vide_pileb(int* p) {
+    return p[0] <= 0;
+}