diff --git a/files/arith4.cpp b/files/arith4.cpp
index 857c9d5..3658b1e 100644
--- a/files/arith4.cpp
+++ b/files/arith4.cpp
@@ -1,7 +1,8 @@
 #include <iostream>
 
 int main() {
-    int a, b;
+    int a{};
+    int b{};
 
     std::cout << "Gebe eine Zahl ein: ";
     std::cin >> a;
diff --git a/files/debugger.cpp b/files/debugger.cpp
index 618ca32..cb6bf5b 100644
--- a/files/debugger.cpp
+++ b/files/debugger.cpp
@@ -1,7 +1,9 @@
 #include <iostream>
 
 int main() {
-    int a, b, c;
+    int a{};
+    int b{};
+    int c{};
 
     std::cout << "Gebe eine Zahl ein: ";
     std::cin >> a;
diff --git a/files/if.cpp b/files/if.cpp
index c84e9aa..455f6d9 100644
--- a/files/if.cpp
+++ b/files/if.cpp
@@ -1,7 +1,8 @@
 #include <iostream>
 
 int main() {
-    int a, b;
+    int a{};
+    int b{};
 
     std::cout << "Gebe eine Zahl ein: ";
     std::cin >> a;