Thread: double -> LPCSTR (if its possible)

  1. #1
    Registered User
    Join Date
    Apr 2007

    double -> LPCSTR (if its possible)

    My Aim is to convert a double type to a LPCSTR and afterwards set it as an item text of an edit box... (in Dialog box not a window)

    I ve got these two lines but apparantly its complete rubbish... Isnt it?
    TCHAR chValue[128];
    double m_iTotal;
    wsprintf(chValue, "%s", m_iTotal);
    SetDlgItemText(hDlg, IDC_EDIT, chValue);
    Do you have any idea how is the conversion possible?

  2. #2
    Registered User
    Join Date
    Jan 2005
    LPCSTR is not a wide character string. TCHAR might be, it might not, depending on whether UNICODE is defined. wsprintf works only on wide character strings.

    So which do you want?

    If you want to use sprintf, I don't think that %s is the proper format specifier for double. Perhaps %f will work better.

  3. #3
    Deathray Engineer MacGyver's Avatar
    Join Date
    Mar 2007
    The format specifer is indeed wrong. Why are you printing a double as a string? Change it to either %f or %lf (check whatever wsprintf() accepts for doubles). You might want to also try to make sure you don't overrun your buffer.

    BTW, LPCSTR is just a pointer to a constant string. In C terms, this is a const char *.

  4. #4
    Registered User
    Join Date
    May 2006
    Instead of using C functions, I would prefer using C++ features...
    std::wstringstream ss;
    ss << m_iTotal;
    SetDlgItemText(hDlg, IDC_EDIT, ss.str().c_str());

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