From 8145ba753df183f0d48cd6e9cc5a01b215eb31dc Mon Sep 17 00:00:00 2001
From: Julian Weigt <juw@posteo.de>
Date: Fri, 16 Jan 2026 13:41:52 +0100
Subject: Properly use header files and change return type for conversion from
 bool to int.

---
 double.h | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'double.h')

diff --git a/double.h b/double.h
index 0c42b04..077b4b8 100644
--- a/double.h
+++ b/double.h
@@ -1,3 +1,6 @@
+#ifndef DOUBLE_H
+#define DOUBLE_H
+
 #include <stdbool.h>
 
 double int_to_valuetype(int);
@@ -24,6 +27,8 @@ double power(double,double);
 
 double to_double(double);
 
-double to_string(char*,double);
+int to_string(char*,double);
+
+int root_to_string(char*,double,double);
 
-double root_to_string(char*,double,double);
+#endif
-- 
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