diff --git a/src/c/a3.c b/src/c/a3.c
index 88296fa..93c11f8 100644
--- a/src/c/a3.c
+++ b/src/c/a3.c
@@ -1,27 +1,27 @@
 #include "a3.h"
-#include <stdlib.h>
 #include <stdio.h>
 #include <memory.h>
+#include <malloc.h>
 
 void memdump(unsigned char *string) {
-    printf("ADDR              00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F  0123456789ABCDEF\n");
+    printf("ADDR\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 array[columns * rows];
 
     for(int i = 0; i < rows; i++) {
-        printf("%p    ", (void *) &string[i * columns]);
+        printf("0x%p\t", (void *) &string[i * columns]);
 
         for (int j = i * columns; j < (i + 1) * columns; j++) {
             printf("%02x ", string[j]);
-            if(string[j] < 0x20 || string[j] > 0x7e) array[j] = '.';
+            if(string[j] <= 0x20 || string[j] >= 0x7e) array[j] = '.';
             else array[j] = string[j];
         }
         printf(" ");
 
         for (int j = i * columns; j < (i + 1) * columns; j++) {
-            printf("%c", array[j]);
+            printf("%c", string[j]);
 
         }
         printf("\n");
@@ -50,7 +50,7 @@ int main(int argc, char **argv) {
     memdump((unsigned char *) argv[1]);
 
 
-    printf("Laenge der Zeichenkette (inkl \\0): %i Bytes\n", (int) strlen(argv[1]));
+    printf("Laenge der Zeichenkette (inkl \\0): %i Byte(s)\n", (int) strlen(argv[1]));
     printf("Ersetzen: '%c' mit '%c'\n", *argv[2], *argv[3]);
 
     unsigned char *copy = malloc(4 * 16 * sizeof(char));
@@ -60,8 +60,7 @@ int main(int argc, char **argv) {
     char *lastAddress = &test;
     int count = memreplace((char *) copy, *argv[2], *argv[3], &lastAddress);
     printf("Suchzeichen wurde %i mal gefunden und ersetzt\n", count);
-    //TODO: change type
-    printf("zuletzt an Addresse %p \n", lastAddress);
+    printf("zuletzt an Addresse 0x%p \n", (void *) lastAddress);
     memdump(copy);
 
     free(copy);