diff --git a/main/main.cpp b/main/main.cpp
index 6b53efe..141faa2 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -1,20 +1,14 @@
+#include "../src/SharedMemory.h"
+#include "vkvm.hpp"
 #include <cstdlib>
 #include <iostream>
 #include <sys/shm.h>
-#include <csignal>
 
-#include "../src/SharedMemory.h"
-#include "vkvm.hpp"
 
 
 int main() {
     vkvm::initialize(0);
     initSharedMemory();
-    struct sigaction sigIntHandler;
-    sigIntHandler.sa_handler = deleteSharedMemory;
-    sigemptyset(&sigIntHandler.sa_mask);
-    sigIntHandler.sa_flags = 0;
-    sigaction(SIGINT, &sigIntHandler, nullptr);
     vkvm::setDefaultValues();
     std::atexit(deleteSharedMemory);
     std::string eingabe;
diff --git a/src/SharedMemory.cpp b/src/SharedMemory.cpp
index 374d980..5da689f 100644
--- a/src/SharedMemory.cpp
+++ b/src/SharedMemory.cpp
@@ -1,16 +1,11 @@
-#include <cstdlib>
 #include "SharedMemory.h"
-#include <iostream>
-#include <fstream>
 #include <cpptoml.h>
+#include <cstdlib>
+#include <fstream>
+#include <iostream>
 #include <vkvm.hpp>
 
-
-
-
-
-key_t changedKey()
-{
+key_t changedKey() {
     std::ofstream keyFile;
     keyFile.open("/tmp/vkvmKey.log", std::ofstream::out | std::ofstream::trunc);
     keyFile.clear();
@@ -18,44 +13,40 @@ key_t changedKey()
     std::cout << "Type in a new Key for the Shared Memory Segment" << std::endl;
     std::cout << "new Key#";
     std::cin >> newKey;
-    std::cout <<"New Key is -> " << newKey << std::endl;
+    std::cout << "New Key is -> " << newKey << std::endl;
     keyFile << newKey;
     keyFile.close();
 
     return key_t(newKey);
 }
 
-std::string getAnswerFromUser()
-{
-    std::cout <<"answer# ";
+std::string getAnswerFromUser() {
+    std::cout << "answer# ";
     std::string answer;
     std::cin >> answer;
-    if(answer.compare("y") == 0 || answer.compare("n") == 0|| answer.compare("override") == 0) {
+    if (answer == "y" || answer == "n" || answer == "override") {
         return answer;
-    } else {
-        std::cout << "wrong input: pls answer with (y) for yes, (n) for no, or (override)\n";
-        getAnswerFromUser();
     }
+    std::cout << "wrong input: pls answer with (y) for yes, (n) for no, or (override)\n";
+    getAnswerFromUser();
     return "-0";
 }
 
 
-void initSharedMemory(void) {
-    if(vkvm::impl.sharedMemoryKey != key_t(0)) {
-        if (shmget(vkvm::impl.sharedMemoryKey, Max_Memory_Size, IPC_CREAT | IPC_EXCL | 0666) < 0)
-        {
+void initSharedMemory() {
+    if (vkvm::impl.sharedMemoryKey != key_t(0)) {
+        if (shmget(vkvm::impl.sharedMemoryKey, Max_Memory_Size, IPC_CREAT | IPC_EXCL | 0666) < 0) {
             std::cout << "Shared Memory with Key: " << vkvm::impl.sharedMemoryKey << " is already in use\n"
-            <<"You can change the Key( type -> y or n ), or you can override the shared memory Segment(type -> override)\n";
+                      << "You can change the Key( type -> y or n ), or you can override the shared memory Segment(type -> override)\n";
             std::string answer = getAnswerFromUser();
-            if(answer.compare("y") == 0)
-            {
+            if (answer == "y") {
                 vkvm::impl.sharedMemoryKey = changedKey();
                 std::cout << "new Try with Key: " << vkvm::impl.sharedMemoryKey << std::endl;
                 initSharedMemory();
-            } else if(answer.compare("n") == 0) {
-                std::cout << "This will end shared memory" <<std::endl;
+            } else if (answer == "n") {
+                std::cout << "This will end shared memory" << std::endl;
                 exit(0);
-            } else if(answer.compare("override") == 0) {
+            } else if (answer == "override") {
                 deleteSharedMemory();
                 initSharedMemory();
             }
@@ -63,34 +54,23 @@ void initSharedMemory(void) {
             std::cout << "Shared Memory is (Re-) allocated with Key: " << vkvm::impl.sharedMemoryKey << std::endl;
         }
     } else {
-        std::cerr <<"key -> " << vkvm::impl.sharedMemoryKey << " is not allowed here " << std::endl;
+        std::cerr << "key -> " << vkvm::impl.sharedMemoryKey << " is not allowed here " << std::endl;
         vkvm::impl.sharedMemoryKey = changedKey();
         initSharedMemory();
     }
 }
 
-void deleteSharedMemory(int s)
-{
-    std::cerr << "programm ended with Code: " << s << std::endl;
-    if (shmctl(shmget(vkvm::impl.sharedMemoryKey, 0, 0), IPC_RMID, 0) < 0 )
-    {
-        std::cerr << "Failed to remove shared Memory, maybe not existing: try cmd: ipcs, then delete with ipcrm -m $memID " << std::endl;
-    } else {
-        std::cout << "shared Memory deleted" << std::endl;
-    }
-}
-
-void deleteSharedMemory(void)
-{
-    if (shmctl(shmget(vkvm::impl.sharedMemoryKey, 0, 0), IPC_RMID, 0) < 0 )
-    {
+void deleteSharedMemory() {
+    int id = shmctl(shmget(vkvm::impl.sharedMemoryKey, 0, 0), IPC_RMID, 0);
+    if (id < 0) {
         std::cerr << "Failed to remove shared Memory, maybe not existing: try cmd: ipcs " << std::endl;
     } else {
+        int x =0;
         std::cout << "shared Memory deleted" << std::endl;
     }
 }
 
-void getConfig(){
+void getConfig() {
     auto config = cpptoml::parse_file(configFile);
 
     int layoutVersion = config->get_as<int>("layoutVersion").value_or(0);
@@ -123,7 +103,7 @@ void getConfig(){
     vkvm::setForegroundColor(vkvm::Color(foregroundColor));
     vkvm::setCharactersPerRow(charactersPerRow);
     vkvm::setCharactersPerColumn(charactersPerColumn);
-    vkvm::setFont(vkvm::FontType(font,"",0,0));
+    vkvm::setFont(vkvm::FontType(font, "", 0, 0));
     vkvm::setMousePosition(mousePositionX, mousePositionY);
 }
 
diff --git a/src/SharedMemory.h b/src/SharedMemory.h
index fb91dad..c15fef4 100644
--- a/src/SharedMemory.h
+++ b/src/SharedMemory.h
@@ -1,16 +1,16 @@
 #ifndef SHARED_MEMORY_H
 #define SHARED_MEMORY_H
+
+#include "internal.hpp" //NOLINT
 #include <sys/shm.h>
-#include <iostream>
-#include "internal.hpp"
 
 //ID-Speicherbereich
 //Größe des Speicherbereichs hier 8MB (8000)
 //Shared-Memory-Segment erstellen oder öffnen – shmget()
-#define Max_Memory_Size 8000 * 512
+constexpr int Max_Memory_Size (8000 * 512);
 void deleteSharedMemory(int s);
-void deleteSharedMemory(void);
-void initSharedMemory(void);
+void deleteSharedMemory();
+void initSharedMemory();
 void getConfig();
 key_t changedKey();
 std::string getAnswerFromUser();
diff --git a/test/test_demo.cpp b/test/test_demo.cpp
index b86e002..25b878f 100644
--- a/test/test_demo.cpp
+++ b/test/test_demo.cpp
@@ -1,5 +1,4 @@
 #include "../src/SharedMemory.h"
-#include <catch2/catch.hpp>
 
 TEST_CASE("Demo test") {
    REQUIRE(42 == 42);
diff --git a/test/test_main.cpp b/test/test_main.cpp
index 6372e38..7096005 100644
--- a/test/test_main.cpp
+++ b/test/test_main.cpp
@@ -1,6 +1,4 @@
 #define CATCH_CONFIG_MAIN
 
-#include <catch2/catch.hpp>
-
 //Dont touch this file.
 // add your own tests in this directory according to https://github.com/catchorg/Catch2/blob/master/docs/tutorial.md