I need to know how to make new classes. I tried looking at the lesson posted on this site, but that didn't help. I tried using the sample code from lesson 12, but got these strange and exotic errors

C:\Program Files\DevStudio\SharedIDE\bin\Cpp1.cpp(1) : error C2653: 'Aclass' : is not a class or namespace name
C:\Program Files\DevStudio\SharedIDE\bin\Cpp1.cpp(3) : error C2065: 'cout' : undeclared identifier
C:\Program Files\DevStudio\SharedIDE\bin\Cpp1.cpp(3) : error C2297: '<<' : bad right operand
C:\Program Files\DevStudio\VC\INCLUDE\ostream.h(145) : error C2371: 'cout' : redefinition; different basic types

Anything helpful on the subject would be appreciated.