From 19a34f35baf681ddf9a8922e4d101d44c1caf9cf Mon Sep 17 00:00:00 2001
From: an154gf <ales.novysedlak@student.tuke.sk>
Date: Mon, 10 Mar 2025 14:34:43 +0100
Subject: [PATCH] fix s nespravnymi operatormi

---
 du3/program.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/du3/program.c b/du3/program.c
index fd8c1fa..b5d3f6f 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -28,7 +28,7 @@ int main() {
                                 index++;
                                 continue;
                         }
-			if (isalpha(buffer[index]) && !error) {
+			if ((isalpha(buffer[index]) || strchr("+-*/=123456789\n", buffer[index]) == NULL) && !error) {
 				error = 1;
 				strcpy(output[output_length], "CHYBA");
 				output_length++;