diff --git a/functions.py b/functions.py
new file mode 100644
index 0000000..069ebd2
--- /dev/null
+++ b/functions.py
@@ -0,0 +1,35 @@
+
+
+
+# L4: Function.
+
+def memory_generateConstPlayfield(
+  n: int
+) -> dict[int, int]:
+  idGroups: dict[int, int] = { }
+  id = 0
+  for gid in range(0, n):
+    idGroups[id] = gid
+    id += 1
+    idGroups[id] = gid
+    id += 1
+  #}
+  return idGroups
+#}
+
+# L20: Test.
+
+def test_memory_generateConstPlayfield(
+) -> str:
+  idGroups = memory_generateConstPlayfield(2)
+  if (
+    len(idGroups) == 4 and
+    idGroups[0] == 0 and
+    idGroups[1] == 0 and
+    idGroups[2] == 1 and
+    idGroups[3] == 1
+  ):
+    return "OK: memory_generateConstPlayfield"
+  #}
+  return "ERR: memory_generateConstPlayfield"
+#}
diff --git a/main.py b/main.py
index 80e386a..f5989e6 100644
--- a/main.py
+++ b/main.py
@@ -1,39 +1,3 @@
-
-
-
-# L4: Function.
-
-def memory_generateConstPlayfield(
-  n: int
-) -> dict[int, int]:
-  idGroups: dict[int, int] = { }
-  id = 0
-  for gid in range(0, n):
-    idGroups[id] = gid
-    id += 1
-    idGroups[id] = gid
-    id += 1
-  #}
-  return idGroups
-#}
-
-# L20: Test.
-
-def test_memory_generateConstPlayfield(
-) -> str:
-  idGroups = memory_generateConstPlayfield(2)
-  if (
-    len(idGroups) == 4 and
-    idGroups[0] == 0 and
-    idGroups[1] == 0 and
-    idGroups[2] == 1 and
-    idGroups[3] == 1
-  ):
-    return "OK: memory_generateConstPlayfield"
-  #}
-  return "ERR: memory_generateConstPlayfield"
-#}
-
-# L36: Run.
+from functions import *
 
 print(test_memory_generateConstPlayfield())
diff --git a/tr-Python-C++/CPP.py b/tr-Python-C++/CPP.py
index dfbd595..6778c58 100644
--- a/tr-Python-C++/CPP.py
+++ b/tr-Python-C++/CPP.py
@@ -3,6 +3,9 @@ from Function import *
 def replaceAnd(s):
     return s.replace("and", "&&")
 
+def replaceComment(s):
+    return s.replace("#", "//")
+
 def replaceLen(s):
     posLen = s.find("len(")
     posEnd = s.find(")")
diff --git a/tr-Python-C++/process.py b/tr-Python-C++/process.py
index ad626b8..a2e496e 100755
--- a/tr-Python-C++/process.py
+++ b/tr-Python-C++/process.py
@@ -9,16 +9,29 @@ def process(FILE_IN):
             lines_in.append(line.rstrip())
 
     f = Function()
+    out = ""
 
     # Parse.
     for ln in lines_in:
         ln = ln.rstrip()
-        f.parseLine(ln)
+
+        # Empty line.
+        if ln == "":
+            out += "\n"
+        # Comment.
+        elif (
+          ln.startswith("#") and
+          not f.isBody
+        ):
+            out += replaceComment(ln) + "\n"
+        # Function.
+        else:
+            f.parseLine(ln)
+
         if f.isComplete:
-            print("Function ready! Here it is in C++:")
             cpp = CPP(f)
-            print(cpp.translate())
+            out += cpp.translate()
             # Create new function instance.
             f = Function()
 
-
+    return out