From a7fd62eda45ee12a1b5b940082c1bdabf60130f8 Mon Sep 17 00:00:00 2001
From: Fabrice <fabrice.reintsch@gmail.com>
Date: Tue, 9 Dec 2025 20:22:27 +0100
Subject: [PATCH] numbers.c passiert alle Tests

---
 numbers.c | 20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/numbers.c b/numbers.c
index 0a48b4d..f4b9029 100644
--- a/numbers.c
+++ b/numbers.c
@@ -32,7 +32,10 @@ unsigned int *createNumbers(unsigned int len)
     indexDuplicate = rand() % len;
   } while (numbers[indexDuplicate] == duplicate);
 
-  numbers[len-1] = numbers[indexDuplicate];
+  if (numbers[len-1] != duplicate) {
+    numbers[len-1] = numbers[indexDuplicate];
+  }
+  
   numbers[indexDuplicate] = duplicate;
   
   return numbers;
@@ -60,12 +63,19 @@ unsigned int getDuplicate(const unsigned int numbers[], unsigned int len)
     return 0;
   }
 
-qsort((void*)numbers, len, sizeof(unsigned int), compare);
+unsigned int *copy = malloc (sizeof(unsigned int) * len);
+memcpy (copy, numbers, sizeof(unsigned int) * len);
+
+qsort(copy, len, sizeof(unsigned int), compare);
 
 for (int i = 0; i < len-1; i++) {
-  if (numbers[i] == numbers [i+1]) {
-    return numbers[i];
+  if (copy[i] == copy [i+1]) {
+    unsigned int result = copy [i];
+    free (copy);
+    return result;
   }
 }
-  return 0;
+
+free (copy);
+return 0;
 }
\ No newline at end of file