Creating the source tree

.gitignore

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+.idea/*
+cmake-build-debug/*

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.15)
+project(Hillnes)
+
+set(CMAKE_CXX_STANDARD 20)
+
+add_executable(Hillnes main.cpp)

main.cpp

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+#include <iostream>
+
+int main() {
+    std::cout << "Hello, World!" << std::endl;
+    return 0;
+}