Coding C / C + + in Visual Studio 2008 code is written grammar Why Error?

(Thai Version)

Students who are studying science in programming languages C / C + + may have a problem writing the code in Visual Studio 2008 and error and the code has been written grammar.

We see from the examples.

Edit and add the following code.

Run the test will not detect the problem.

Thank you,

Worawut  Bunwang