Add cpp project

c++/.gitignore

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+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+.idea
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# SonarLint plugin
+.idea/sonarlint/
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser

c++/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.27)
+project(c__)
+
+set(CMAKE_CXX_STANDARD 17)
+
+add_library(c__ STATIC library.cpp
+        library.cpp
+        "Typing discipline/Currying/main.cpp"
+        "Typing discipline/High-order function/main.cpp"
+        "Typing discipline/SumTypes/main.cpp"
+        "Typing discipline/Tail Recursion/main.cpp")

c++/library.cpp

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+#include "library.h"
+
+#include <iostream>
+
+void hello() {
+    std::cout << "Hello, World!" << std::endl;
+}

c++/library.h

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+#ifndef C___LIBRARY_H
+#define C___LIBRARY_H
+
+void hello();
+
+#endif //C___LIBRARY_H