diff --git a/src/c/a3.c b/src/c/a3.c
index bec5ab4..424aa8a 100644
--- a/src/c/a3.c
+++ b/src/c/a3.c
@@ -2,17 +2,28 @@
 #include <stdio.h>
 #include <memory.h>
 #include <malloc.h>
+#include <stdint.h>
 
 void memdump(unsigned char *string) {
-    printf("ADDR\t\t00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F  0123456789ABCDEF\n");
+    printf("ADDR\t\t\t00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F  0123456789ABCDEF\n");
 
     int columns = 16;
     int rows = 4;
     char symbols[columns * rows];
 
+    if((long) string % 16 != 0) {
+        string = string - ((long) string % 16);
+    }
+
+
     for(int i = 0; i < rows; i++) {
         printf("%p\t", (void *) &string[i * columns]);//print address
 
+        if((long) string % 16 != 0) {
+            printf("oh nein, kein mod 16");
+        }
+
+
         for (int j = i * columns; j < (i + 1) * columns; j++) {
             printf("%02x ", string[j]);//print char number
             if(string[j] < 0x20 || string[j] > 0x7e)//check for printable characters