From e117db2acaec6e08c7b91210b5598c66cc4c2197 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kamil=20Gejdo=C5=A1?= <kamil.gejdos@student.tuke.sk>
Date: Wed, 4 Mar 2026 19:15:11 +0000
Subject: [PATCH] Update du1/program.c

funguje uz
---
 du1/program.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/du1/program.c b/du1/program.c
index e69de29..d61f74f 100644
--- a/du1/program.c
+++ b/du1/program.c
@@ -0,0 +1,21 @@
+#include <stdio.h>
+
+int main(){
+    
+    int c= 0;
+    while(1){
+
+        c = getchar();
+        if (c < 0) break;
+
+        if (c >= 97 && c <= 122){
+            c = c - 'a' + 'A';
+        } else
+        if (c >= 65 && c <= 90){
+            c = c - 'A' + 'a';
+        }
+        putchar(c);
+    }
+
+    return 0;
+}
\ No newline at end of file