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.

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

(limited to 'ratio.h')

diff --git a/ratio.h b/ratio.h
index ff4015e..e273f7f 100644
--- a/ratio.h
+++ b/ratio.h
@@ -1,3 +1,6 @@
+#ifndef RATIO_H
+#define RATIO_H
+
 #include <stdbool.h>
 
 typedef struct {bool s; unsigned long long n; unsigned long long d;} rational;
@@ -27,6 +30,8 @@ rational power(rational,unsigned int);
 
 double to_double(rational);
 
-bool to_string(char*,rational r);
+int to_string(char*,rational r);
+
+int root_to_string(char*,rational r,unsigned int);
 
-bool root_to_string(char*,rational r,unsigned int);
+#endif
-- 
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