1 files changed, 6 insertions, 2 deletions
diff --git a/05/main.c b/05/main.c
index 058573f..ee2e51b 100644
--- a/05/main.c
+++ b/05/main.c
@@ -1,8 +1,12 @@
-#define STRINGIFY2(x) #x
+#define STRINGIFY2(x) # x
 #define STRINGIFY(x) STRINGIFY2(x)
+#define JOIN2(x,y) x ##  y
+#define JOIN(x,y) JOIN2(x, y)
 #define X 22
-STRINGIFY(X)
 
+JOIN2(X, X)
+
+STRINGIFY(X)
 
 #define E 5
 #define D E