1 files changed, 6 insertions, 0 deletions

diff --git a/utils.h b/utils.h
new file mode 100644
index 0000000..357f0d2
--- /dev/null
+++ b/utils.h
@@ -0,0 +1,6 @@
+#ifndef UTILS_H
+#define UTILS_H
+
+int is_number(char *str);
+
+#endif
\ No newline at end of file