diff --git a/lib/conv.c b/lib/conv.c
new file mode 100644
index 0000000..5ed3295
--- /dev/null
+++ b/lib/conv.c
@@ -0,0 +1,2 @@
+#include "conv.h"
+
diff --git a/lib/conv.h b/lib/conv.h
new file mode 100644
index 0000000..0c037b9
--- /dev/null
+++ b/lib/conv.h
@@ -0,0 +1 @@
+void int_to_str(int i, char* buf);
diff --git a/lib/strf.c b/lib/strf.c
deleted file mode 100644
index 65dddc7..0000000
--- a/lib/strf.c
+++ /dev/null
@@ -1,15 +0,0 @@
-#include "strf.h"
-
-#define int_offset 48
-// 0:48 - 9:57
-
-char* int_to_str(int i, char* strbuf) {
-	if( i == 0 ) {
-		return (char*)(int_offset);
-	} else {
-		char cbuf;
-		cbuf = (char)((i % 10) + int_offset);
-
-		return int_to_str(i / 10, strbuf + cbuf);
-	}
-}
diff --git a/lib/strf.h b/lib/strf.h
deleted file mode 100644
index 29649bc..0000000
--- a/lib/strf.h
+++ /dev/null
@@ -1 +0,0 @@
-char* int_to_str(int i, char* strbuf);