Just simply use whatever buildtool you have(it's Cmake to me) to build and run.
under project folder:
cmake . -Bbuild
cmake --build build
and you should find the executable in ./build.
to run the code directly:
RayTracing.exe
or with custom samplers amount (taking 512 for an example)
RayTracing.exe 512
BE AWARE!! Due to my poor coding technics, your PC is much likely to be FROZEN during the run. Sorry about that :(
Here comes some images rendered from the little Ray Tracer :)