I compile the following code but I get a compile error in Visual Studio that I cannot understand.
#include using namespace std; int main()
Look at https://stackoverflow.com/a/4726838/2963099
Turn off pre compiled headers:
Project Properties -> C++ -> Precompiled Headers
set Precompiled Header to "Not Using Precompiled Header".
Precompiled Header
"Not Using Precompiled Header"