diff --git a/common.h b/common.h
index 1bf5642..8bd2f6a 100644
--- a/common.h
+++ b/common.h
@@ -61,6 +61,9 @@
 /* Allows different macros using "_" nested with each other. */
 # define nest(v1, v2, b)  { clone(v1, v2) b }
 
+/* Cast Var "var" into builtin type in C specified with "type". */
+# define cast(var, type)  (*(type *)var.addr)
+
 // # define lambda(param, body, capfmt, ...)  {\
 //   /* Duplicate everything from cap. */\
 //   va_list ptr;\
diff --git a/test.c b/test.c
index 13b25f1..20e03b4 100644
--- a/test.c
+++ b/test.c
@@ -53,7 +53,8 @@ Status Main(void)
   fail(Array_Create(&arr, 8, sizeof(long long)));
   
   for (register int i = 0; i < arr.len; i++) {
-    (void)printf("%d:\t%p\n", i, arr.members[i].addr);
+    cast(arr.members[i], long long) = INT64_MAX;
+    (void)printf("%lld\n", cast(arr.members[i], long long));
   }
   
   Array_Delete(&arr);