FIX: ClassWizard Parsing Error with Float Variables
ID: Q108521
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The information in this article applies to:
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The ClassWizard, included with:
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Microsoft Visual C++ for Windows, versions 1.0, 1.5
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Microsoft Visual C++ 32-bit Edition, versions 1.0, 2.0
SYMPTOMS
After entering a maximum or minimum float variable value in the edit
variable option of Class Wizard, a parsing error happens when starting up
Class Wizard again with the same project. Any number entered that is
greater than 999,999 will cause this problem.
RESOLUTION
The minimum and maximum information for the float is written out to the
dialog box's .CPP file (in the case above, CDDXPROP.CPP, in the
DoDataExchange member function). In this case, it is written as:
DDV_MinMaxFloat(pDX, m_edit, 0., 1.e+008);
Changing the scientific notation in the .CPP file from 1.e+008 to its
original form as 99999999 will solve the parsing problem, and Class Wizard
will open as expected without displaying the parsing error.
STATUS
Microsoft has confirmed this to be a bug in the Microsoft products
listed at the beginning of this article. This bug was corrected in Visual
C++ 2.1.
MORE INFORMATION
To reproduce this problem, do the following:
- Choose Open from the Project menu in the Visual Workbench and open the
Trace project in the \MSVC\MFC\SAMPLES\TRACER directory.
- From the Tools menu, choose AppStudio.
- Highlight the dialog box choice and choose New. Choose Dialog from the
New Resource dialog box.
- From the palette of controls, choose an edit control and drag it onto
the dialog box.
- From the Resource menu, choose Class Wizard.
- At this point you will be prompted to create a new class. Name the
class CDDXProp and then choose Create Class.
- Choose Member Variables tab, highlight IDC_EDIT1.
- Choose Add Variables and name the variable m_edit. Change the variable
type to float and choose OK.
- Set the minimum value to 0 (zero) and the maximum value to 99999999 and
exit Class Wizard.
- Restart the Class Wizard by choosing Class Wizard from the resource
menu of App Studio.
The following error appears:
Parsing error: Expected ")"
Input Line: "DDV_MinMaxFloat(pDX, m_edit, 0., 1.e+008);"
The number 99999999 has been written out in scientific notation to the
dialog's .CPP file.
Additional query words:
1.00 1.50 2.00 DDX\DDV float parsing error
Keywords : kbwizard kbMFC kbVC
Version : winnt:
Platform : winnt
Issue type :