Implement null pointer error demonstration

cpp/include/ktbind/dummy.cpp

@@ -0,0 +1,30 @@
+#include <iostream>
+
+void causeNullPointerError() {
+    int* ptr = nullptr; // 1. Pointer is explicitly set to NULL
+
+    // ... some other logic ...
+
+    // 2. ERROR: Dereferencing the null pointer
+    *ptr = 42; 
+
+    std::cout << "Value: " << *ptr << std::endl;
+}
+
+void checkAfterDereference(int* x) {
+    // 3. ERROR: Dereferencing 'x' before checking if it is null
+    *x = 10; 
+
+    if (x == nullptr) {
+        return;
+    }
+}
+
+int main() {
+    causeNullPointerError();
+
+    int* val = nullptr;
+    checkAfterDereference(val);
+
+    return 0;
+}