implemented realloc as well as a bunch of fixes and some small changes like changing the order of arguments for !, making alloc drop etc.

tests/mem.sl

@@ -1,9 +1,39 @@
 import ../stdlib/stdlib.sl
-import ../stdlib/io.sl
 
 word main
-    mem 5 swap !
-    mem 8 + 6 swap !
+    mem 5 !
+    mem 8 + 6 !
     mem @ puti cr
     mem 8 + @ puti cr
+
+    10 alloc
+    dup
+    10 97 memset
+    10 2dup puts
+    free
+
+
+    # Test realloc: allocate 16 bytes, fill with data, then grow to 32 bytes
+    16 alloc
+    dup 111 !       # Store 111 at offset 0
+    dup 8 + 222 !   # Store 222 at offset 8
+
+    # Realloc to 32 bytes
+    16 32 realloc  # ( addr old_len=16 new_len=32 ) -> ( new_addr )
+
+    # Verify old data is preserved
+    dup @ puti cr         # Should print 111
+    dup 8 + @ puti cr     # Should print 222
+
+    # Write new data to the expanded region
+    dup 16 + 333 !        # Store 333 at offset 16
+    dup 24 + 444 !        # Store 444 at offset 24
+
+    # Print all values to verify
+    dup @ puti cr         # 111
+    dup 8 + @ puti cr     # 222
+    dup 16 + @ puti cr    # 333
+    dup 24 + @ puti cr    # 444
+
+    32 free
 end