implement entities

Signed-off-by: Lizzy Fleckenstein <lizzy@vlhl.dev>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/array.h b/include/array.h
index 5f81798..9affdde 100644
--- a/include/array.h
+++ b/include/array.h
@@ -6,6 +6,8 @@
 #define ARRAY_H
 
 #include <stddef.h>
+#include <string.h>
+#include <stdlib.h>
 
 #define len(X) (sizeof X / sizeof *X)
 #define array(T) struct { size_t len; T *data; }