diff --git a/P04_Modularisieren_von_C_Code/work/modularize/bin/triangle b/P04_Modularisieren_von_C_Code/work/modularize/bin/triangle
index fddacc5..d131374 100755
Binary files a/P04_Modularisieren_von_C_Code/work/modularize/bin/triangle and b/P04_Modularisieren_von_C_Code/work/modularize/bin/triangle differ
diff --git a/P04_Modularisieren_von_C_Code/work/modularize/src/read.c b/P04_Modularisieren_von_C_Code/work/modularize/src/read.c
index 17f07a6..05c2a20 100644
--- a/P04_Modularisieren_von_C_Code/work/modularize/src/read.c
+++ b/P04_Modularisieren_von_C_Code/work/modularize/src/read.c
@@ -12,6 +12,7 @@
  * @brief Lab implementation
  */
 // begin students to add code for task 4.1
+#include <stdio.h>
 #define EOL 10
 #define PARSE_ERROR -1
 #define READ_ERROR -2
@@ -20,30 +21,13 @@
 #define ASCII_DIGIT_9 57
 #define NO_POS -1
 #define BUFFERSIZE 10
-#define EOF -1
 int getInt(int maxResult) {
-    // end of input
-    //int EOF = -1; // end of file
-    //int EOL = 10; // end of line
-    // abnormal return values
-    //int PARSE_ERROR = -1;
-    //int READ_ERROR  = -2;
-    // ASCII Codes
-    //int ASCII_SPACE   = 32; // ' '
-    //int ASCII_DIGIT_0 = 48; // '0'
-    //int ASCII_DIGIT_9 = 57; // '9'
-
-    // conversion buffer
-    //int NO_POS = -1;
-    //int BUFFERSIZE = 10;
     char buffer[BUFFERSIZE] = {0};
-
     int result = 0;
 
     // read line: up to EOL or EOF (i.e. error while reading)
     int bytes = 0;
-    int input;
-    scanf("%d", &input);
+    int input = getchar();
     while ((input != EOL) && (input != EOF)) { // read whole line
         if (bytes < BUFFERSIZE) { // only buffer first n characters
             buffer[bytes] = (char)input;
@@ -51,7 +35,7 @@ int getInt(int maxResult) {
         } else {
             result = PARSE_ERROR; // exceed buffer size, continue read line
         }
-        scanf("%d", &input);
+        input = getchar();
     }
     if (input == EOF) {
         result = READ_ERROR;
diff --git a/P04_Modularisieren_von_C_Code/work/modularize/src/read.d b/P04_Modularisieren_von_C_Code/work/modularize/src/read.d
index bc19a4f..5c2ca14 100644
--- a/P04_Modularisieren_von_C_Code/work/modularize/src/read.d
+++ b/P04_Modularisieren_von_C_Code/work/modularize/src/read.d
@@ -1 +1,18 @@
-src/read.o: src/read.c /usr/include/stdc-predef.h
+src/read.o: src/read.c /usr/include/stdc-predef.h /usr/include/stdio.h \
+ /usr/include/x86_64-linux-gnu/bits/libc-header-start.h \
+ /usr/include/features.h /usr/include/x86_64-linux-gnu/sys/cdefs.h \
+ /usr/include/x86_64-linux-gnu/bits/wordsize.h \
+ /usr/include/x86_64-linux-gnu/bits/long-double.h \
+ /usr/include/x86_64-linux-gnu/gnu/stubs.h \
+ /usr/include/x86_64-linux-gnu/gnu/stubs-64.h \
+ /usr/lib/gcc/x86_64-linux-gnu/7/include/stddef.h \
+ /usr/include/x86_64-linux-gnu/bits/types.h \
+ /usr/include/x86_64-linux-gnu/bits/typesizes.h \
+ /usr/include/x86_64-linux-gnu/bits/types/__FILE.h \
+ /usr/include/x86_64-linux-gnu/bits/types/FILE.h \
+ /usr/include/x86_64-linux-gnu/bits/libio.h \
+ /usr/include/x86_64-linux-gnu/bits/_G_config.h \
+ /usr/include/x86_64-linux-gnu/bits/types/__mbstate_t.h \
+ /usr/lib/gcc/x86_64-linux-gnu/7/include/stdarg.h \
+ /usr/include/x86_64-linux-gnu/bits/stdio_lim.h \
+ /usr/include/x86_64-linux-gnu/bits/sys_errlist.h
diff --git a/P04_Modularisieren_von_C_Code/work/modularize/src/read.o b/P04_Modularisieren_von_C_Code/work/modularize/src/read.o
index ec055bf..77b6798 100644
Binary files a/P04_Modularisieren_von_C_Code/work/modularize/src/read.o and b/P04_Modularisieren_von_C_Code/work/modularize/src/read.o differ
diff --git a/P04_Modularisieren_von_C_Code/work/modularize/tests/runtest b/P04_Modularisieren_von_C_Code/work/modularize/tests/runtest
new file mode 100755
index 0000000..3e5869d
Binary files /dev/null and b/P04_Modularisieren_von_C_Code/work/modularize/tests/runtest differ
diff --git a/P04_Modularisieren_von_C_Code/work/modularize/tests/stderr.txt b/P04_Modularisieren_von_C_Code/work/modularize/tests/stderr.txt
new file mode 100644
index 0000000..e69de29
diff --git a/P04_Modularisieren_von_C_Code/work/modularize/tests/stdout.txt b/P04_Modularisieren_von_C_Code/work/modularize/tests/stdout.txt
new file mode 100644
index 0000000..8e874bc
--- /dev/null
+++ b/P04_Modularisieren_von_C_Code/work/modularize/tests/stdout.txt
@@ -0,0 +1,8 @@
+
+Dreiecksbestimmung (CTRL-C: Abbruch)
+Seite a: Seite a: Seite a: Seite a: Seite a: Seite b: Seite b: Seite b: Seite b: Seite b: Seite c: Seite c: -> Dreieck 3-4-5 ist rechtwinklig
+
+Dreiecksbestimmung (CTRL-C: Abbruch)
+Seite a: 
+
+bye bye