diff --git a/.gitignore b/.gitignore
index 03331d3..691b863 100644
--- a/.gitignore
+++ b/.gitignore
@@ -92,3 +92,10 @@ flycheck_*.el
 
 
 # End of https://www.toptal.com/developers/gitignore/api/emacs
+
+
+# Emacs as IDE for C++
+
+.ccls-cache/
+*.swp
+*~
\ No newline at end of file
diff --git a/ChangeLog b/ChangeLog
index e51f8fa..2607bb8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2025-07-12  Mert Gör  <hwpplayer1@masscollabs>
+
+	* README.md: experimental2025 started
+
 2024-07-26  hwpplayer1  <hwpplayer1@debian>
 
 	* src/decleration.cpp: decleration example
diff --git a/src/calculate.cpp b/src/calculate.cpp
deleted file mode 100644
index b9a5083..0000000
--- a/src/calculate.cpp
+++ /dev/null
@@ -1,12 +0,0 @@
-#include <iostream>
-
-int main()
-{
-  std::cout << "enter two numbers:" << std::endl;
-  int value1 = 0, value2 = 0;
-  std::cin >> value1 >> value2;
-  std::cout << "The sum of " << value1 << " and " << value2
-	    << " is " << value1 + value2 << std::endl;
-
-  return 0;
-}
diff --git a/src/decleration.cpp b/src/decleration.cpp
deleted file mode 100644
index 98ef00c..0000000
--- a/src/decleration.cpp
+++ /dev/null
@@ -1,13 +0,0 @@
-#include <iostream>
-
-using std::cin;
-using std::cout; using std::endl;
-int main()
-{
-  cout << "Enter two numbers:" << endl;
-  int v1, v2;
-  cin >> v1 >> v2;
-  cout << "The sum of " << v1 << " and " << v2
-       << " is " << v1 + v2 << endl;
-  return 0;
-}
diff --git a/src/for_example.cpp b/src/for_example.cpp
deleted file mode 100644
index 7951c32..0000000
--- a/src/for_example.cpp
+++ /dev/null
@@ -1,14 +0,0 @@
-#include <iostream>
-
-int main()
-{
-  int sum = 0;
-
-  for (int value = 1; value <= 10; ++value)
-
-  sum += value;
-    
-  std::cout << "Sum of 1 to 10 inclusive is "
-	    << sum << std::endl;
-  return 0;
-}
diff --git a/src/for_example_2.cpp b/src/for_example_2.cpp
deleted file mode 100644
index 27eecf5..0000000
--- a/src/for_example_2.cpp
+++ /dev/null
@@ -1,15 +0,0 @@
-#include <iostream>
-
-int main()
-{
-  int sum = 0;
-
-  for (int value = 1; value <= 5; ++value)
-    {
-      sum += value;
-    }
-    
-  std::cout << "Sum of 1 to 10 inclusive is "
-	    << sum << std::endl;
-  return 0;
-}
diff --git a/src/hello.cpp b/src/hello.cpp
index 3e72591..b53b963 100644
--- a/src/hello.cpp
+++ b/src/hello.cpp
@@ -1,8 +1,7 @@
 #include <iostream>
 
-int main()
-{
-  std::cout << "Hello World of C++\n";
-  
-  return 0;
+int main() {
+  std::cout << "hello c++ 20!" << std::endl;
+
+  return  0;
 }
diff --git a/src/if_statement.cpp b/src/if_statement.cpp
deleted file mode 100644
index 2fb590b..0000000
--- a/src/if_statement.cpp
+++ /dev/null
@@ -1,28 +0,0 @@
-#include <iostream>
-
-int main()
-{
-    int currVal = 0, val = 0;
-
-    if (std::cin >> currVal)
-    {
-        int cnt = 1;
-        while (std::cin >> val)
-        {
-            if (val == currVal)
-            {
-                ++cnt;
-            }
-            else
-            {
-                std::cout << currVal << " occurs "
-                          << cnt << " times " << std::endl;
-                currVal = val;
-                cnt = 1;
-            }
-        }
-        std::cout << currVal << " occurs "
-                  << cnt << " times " << std::endl;
-    }
-    return 0;
-}
\ No newline at end of file
diff --git a/src/local_j.cpp b/src/local_j.cpp
deleted file mode 100644
index ff78f7d..0000000
--- a/src/local_j.cpp
+++ /dev/null
@@ -1,15 +0,0 @@
-#include <iostream>
-
-int i = 42;
-
-int main()
-{
-    int i = 100;
-    std::cout << "int i local i is "
-              << i << std::endl;
-    int j = i;
-    std::cout << "int j local j is "
-              << i << std::endl;
-
-    return 0;
-}
\ No newline at end of file
diff --git a/src/namespace_decleration.cpp b/src/namespace_decleration.cpp
deleted file mode 100644
index 98ef00c..0000000
--- a/src/namespace_decleration.cpp
+++ /dev/null
@@ -1,13 +0,0 @@
-#include <iostream>
-
-using std::cin;
-using std::cout; using std::endl;
-int main()
-{
-  cout << "Enter two numbers:" << endl;
-  int v1, v2;
-  cin >> v1 >> v2;
-  cout << "The sum of " << v1 << " and " << v2
-       << " is " << v1 + v2 << endl;
-  return 0;
-}
diff --git a/src/reused_scope.cpp b/src/reused_scope.cpp
deleted file mode 100644
index 0b3491f..0000000
--- a/src/reused_scope.cpp
+++ /dev/null
@@ -1,18 +0,0 @@
-#include <iostream>
-
-int reused = 42;
-
-int main()
-{
-    int unique = 0;
-
-    std::cout << reused << " " << unique << std::endl;
-
-    int reused = 0;
-
-    std::cout << reused << " " << unique << std::endl;
-
-    std::cout << ::reused << " " << unique << std::endl;
-
-    return 0;
-}
\ No newline at end of file
diff --git a/src/scope_example.cpp b/src/scope_example.cpp
deleted file mode 100644
index 3682bad..0000000
--- a/src/scope_example.cpp
+++ /dev/null
@@ -1,14 +0,0 @@
-#include <iostream>
-
-int main()
-{
-    int sum = 0;
-    for (int val = 0; val <= 10; ++val)
-    
-        sum += val;
-        std::cout << "Sum of 1 to 10 inclusive is "
-                  << sum << std::endl;
-    
-
-    return 0;
-}
\ No newline at end of file
diff --git a/src/sum_numbers.cpp b/src/sum_numbers.cpp
deleted file mode 100644
index d6e42db..0000000
--- a/src/sum_numbers.cpp
+++ /dev/null
@@ -1,16 +0,0 @@
-#include <iostream>
-
-int main()
-{
-  int sum = 0, value = 50;
-
-  while(value <= 100)
-    {
-      sum += value;
-      ++value;
-    }
-
-  std::cout << "Sum of 50 to 100 inclusive is " << sum << std::endl;
-
-  return 0;
-}
diff --git a/src/while_statement.cpp b/src/while_statement.cpp
deleted file mode 100644
index 5b33db0..0000000
--- a/src/while_statement.cpp
+++ /dev/null
@@ -1,16 +0,0 @@
-#include <iostream>
-
-int main()
-{
-  int sum = 0, value = 1;
-
-  while(value <= 10)
-    {
-      sum += value;
-      ++value;
-    }
-
-  std::cout << "Sum of 1 to 10 inclusive is " << sum << std::endl;
-
-  return 0;
-}