fatal error C1004: unexpected end-of-file found

In C++, the class keyword requires a semicolon after the closing brace:

class Something {

};  // <-- This semicolon character is missing in your code sample.

Your class Something needs to have a terminating semicolon.

class Something{

}; // missing

You need a semicolon (;) after the closing brace (}) of the class Something definition