diff --git a/.gitignore b/.gitignore
index 9f5c0b2..190a0e9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1 @@
-mem
+test_memory
diff --git a/gen-C++ b/gen-C++
index 428951d..4e61e12 100755
--- a/gen-C++
+++ b/gen-C++
@@ -1 +1,5 @@
-c++ -o mem language-C++/src/test.cpp
+c++ -o test_memory \
+  -Ilanguage-C++/Memory/src \
+  language-C++/Memory/src/Memory.Aux.cpp \
+  language-C++/Memory/src/Memory.Test.cpp \
+  language-C++/src/test.cpp
diff --git a/language-C++/Memory/src/Memory.Aux.cpp b/language-C++/Memory/src/Memory.Aux.cpp
index e69de29..067f7ca 100644
--- a/language-C++/Memory/src/Memory.Aux.cpp
+++ b/language-C++/Memory/src/Memory.Aux.cpp
@@ -0,0 +1,12 @@
+#include <map>
+#include "Memory.h"
+
+std::map<int, int> memory_generateConstPlayfield(int n) {
+  std::map<int, int> idGroups;
+  int id = 0;
+  for (int gid = 0; gid < n; ++gid) {
+    idGroups[id++] = gid;
+    idGroups[id++] = gid;
+  }
+  return idGroups;
+}
diff --git a/language-C++/Memory/src/Memory.Test.cpp b/language-C++/Memory/src/Memory.Test.cpp
new file mode 100644
index 0000000..1a323b9
--- /dev/null
+++ b/language-C++/Memory/src/Memory.Test.cpp
@@ -0,0 +1,17 @@
+#include <string>
+#include "Memory.h"
+
+std::string test_memory_generateConstPlayfield() {
+  std::map<int, int> idGroups = memory_generateConstPlayfield(2);
+  if (
+    idGroups.size() == 4 &&
+    idGroups[0] == 0 &&
+    idGroups[1] == 0 &&
+    idGroups[2] == 1 &&
+    idGroups[3] == 1
+  ) {
+    return "OK: memory_generateConstPlayfield";
+  }
+
+  return "ERR: memory_generateConstPlayfield";
+}
diff --git a/language-C++/Memory/src/Memory.h b/language-C++/Memory/src/Memory.h
new file mode 100644
index 0000000..7bfd942
--- /dev/null
+++ b/language-C++/Memory/src/Memory.h
@@ -0,0 +1,5 @@
+#include <map>
+#include <string>
+
+std::map<int, int> memory_generateConstPlayfield(int n);
+std::string test_memory_generateConstPlayfield();
diff --git a/language-C++/src/test.cpp b/language-C++/src/test.cpp
index 37130f3..404e5ee 100644
--- a/language-C++/src/test.cpp
+++ b/language-C++/src/test.cpp
@@ -1,5 +1,8 @@
+#include "Memory.h"
 #include <iostream>
 
 int main() {
-  std::cout << "Hello, world! C++" << std::endl;
+  std::cout
+    << test_memory_generateConstPlayfield()
+    << std::endl;
 }