From caf2165e43f0652d7f10abbd06e695e5a7fdd270 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tom=C3=A1=C5=A1=20Kl=C3=A9ger?= <klegetom@fit.cvut.cz>
Date: Mon, 13 Oct 2025 11:46:39 +0200
Subject: [PATCH] ex-04: Check for negative numbers

---
 exercise-04-multiplication-table/main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/exercise-04-multiplication-table/main.c b/exercise-04-multiplication-table/main.c
index 63010dc..116dab2 100644
--- a/exercise-04-multiplication-table/main.c
+++ b/exercise-04-multiplication-table/main.c
@@ -2,10 +2,10 @@
 #include <stdio.h>
 
 int main() {
-	int range;
+	int range = -1;
 
 	printf("Rozsah:\n");
-	if (scanf("%d", &range) != 1) {
+	if (scanf("%d", &range) != 1 || range <= 0) {
 		printf("Nespravny vstup.\n");
 		return EXIT_FAILURE;
 	}