File list (Check if you may need any files):
zy_3_simple_expression
......................\CExpression.txt
......................\CExpression_out.txt
......................\cyio.h
......................\Debug
......................\simple_expression.cpp
......................\zy_3_simple_expression.dsp
......................\zy_3_simple_expression.dsw
......................\zy_3_simple_expression.ncb
......................\zy_3_simple_expression.opt
......................\zy_3_simple_expression.plg