6. To make the Visual Studio C++ compiler work, we have to run a script called vcvarsall.bat. The script location on Visual Studio 7 Community Edition is: C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvarsall.bat. But, in order to call it, we have to give a parameter x86 for 64bit system. You can also write call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvarsall.bat" x64 in a bat file.