From 40a6501fde4a4b76a3c1e73740a797ae705525ac Mon Sep 17 00:00:00 2001
From: Jonas <urbanjo98912@th-nuernberg.de>
Date: Sun, 23 Nov 2025 17:29:45 +0100
Subject: [PATCH] fixing error in dublicateRandomEntry

---
 I2_Dobble/numbers.c | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/I2_Dobble/numbers.c b/I2_Dobble/numbers.c
index fea8960..f3f23d2 100644
--- a/I2_Dobble/numbers.c
+++ b/I2_Dobble/numbers.c
@@ -13,10 +13,23 @@
 
 static void dublicateRandomEntry (unsigned int *numbers, unsigned int len)
 {
-    unsigned int dubIndx = rand() % len;
-    unsigned int copyIndx = rand() % len;
+   if (numbers && len > 2)
+   {
+        unsigned int dubIndx = rand() % len;
+        unsigned int copyIndx;
+        
+        do {
+            copyIndx = rand() % len;
+        } while (copyIndx == dubIndx);
 
-    numbers[copyIndx] = numbers[dubIndx];
+        numbers[len - 1] = numbers[dubIndx];
+
+        //switching last entry with random other entry
+        unsigned int temp;
+        temp = numbers[copyIndx];
+        numbers[copyIndx] = numbers[len - 1];
+        numbers[len - 1] = temp;
+    }
 }
 
 static int compare(const void *a, const void *b)