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C++ Basics — Historical Baseline

Archived learning snapshot. Active development of the IPv4 subnet calculator has moved to IPv4 Subnet Calculator Multilang.

This repository is retained as a historical record of the initial C++20 toolchain setup and the first standalone C++ version of the calculator.

Why this repository is archived

The calculator was consolidated into one stronger portfolio repository that now provides:

  • aligned Java 21, C++20 and Python 3.12 implementations
  • one normative behavior specification
  • interactive, direct and help modes
  • shared fachliche contract cases
  • language-specific tests
  • GitHub Actions
  • a dedicated project page

Keeping the original copy active would duplicate the same small application and weaken the portfolio structure.

Preserved historical scope

This snapshot documents:

  • C++20
  • CLion
  • CMake and Ninja
  • a header/source project split
  • std::string_view and std::from_chars
  • fixed-width IPv4 integer types
  • IPv4/CIDR parsing and bitwise subnet calculation
  • local build output excluded from Git
  • cross-platform learning use on an Intel iMac and Windows ThinkPad

Historical commands

Configure and build:

cmake -S . -B build -G Ninja
cmake --build build

Run the calculator:

./build/cpp_basics 192.168.10.42/24

Canonical successor

Use the maintained project for current code, tests and documentation:

Status

Historical snapshot. No further feature development is planned in this repository.