You can now compile using Visual C++ without Visual Studio:

Announcing Visual C++ Build Tools 2015 – standalone C++ tools for build environments

by Marian Luparu

From the article:

Together with the availability of Visual Studio 2015 Update 1 RC, we’re also announcing a new way of acquiring the C++ tools: as a standalone installer that only lays down the tools required to build C++ projects without installing the Visual Studio IDE. This new installer is meant to streamline the delivery of the C++ build tools in your build environments and continuous-integration systems.