Convert Alpha to Hexadecimal to use on #AARRGGBB colors.

Use:

./alpha2hex -a {alpha_value}

The requirements are:

• cmake 3.14+.
• C++17 compatible compiler
• Git

To configure:

cmake -S . -B build

Add -GNinja if you have Ninja.

To build:

cmake --build build

To test (--target can be written as -t in CMake 3.15+):

cmake --build build --target test

To use an IDE, such as Xcode:

cmake -S . -B xbuild -GXcode
cmake --open xbuild

Kudos for:

• https://cliutils.gitlab.io/modern-cmake/ for the great resource about modern cmake.
• https://stackoverflow.com/a/11286013/378589 very well explained answer.
• https://github.com/ademar111190 for the lovely java version.