CString object always return pointer value

Question

In visual studio 2015 environment, I just made simple Win32 console application program project to study MFC. (Also, I check on adding common header file of MFC in project Wizard process)

And Here is main part of this project..

#include "stdafx.h"
#include "Practice02.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

CWinApp theApp;

using namespace std;

int main()
{
    int nRetCode = 0;

    HMODULE hModule = ::GetModuleHandle(nullptr);

    if (hModule != nullptr)
    {
        if (!AfxWinInit(hModule, nullptr, ::GetCommandLine(), 0))
        {
            wprintf(L"error: sample\n");
            nRetCode = 1;
        }
        else
        {
            CString temp(L"Hello");
            cout << temp << endl;
        }
    }
    else
    {
        wprintf(L"Fatal Error: GetModuleHandle failure\n");
        nRetCode = 1;
    }

    return nRetCode;
}

My intention is to make simple program which prints CString object containing "hello" value on cmd screen.

However, after start this project, I only see the address value of this object. (EX. 0039841 or 003913E1 etc...)

Where should I modify this code to print real value of CString object?

Your CStrings are wide as you're compiling with _UNICODE defined, print to wcout instead. — user657267
– user657267, Commented Mar 21, 2016 at 7:23
Yes, this project use UNICODE setting. And, I change a code from "cout << temp << endl;" to "wcout << temp << endl;". However, outcome still is address value. ;( — 구마왕
– 구마왕, Commented Mar 21, 2016 at 7:28
I can't make any sense of that. For a console program, you can create a console project. Add #include <atlstr.h> and #include "windows.h" then you can use CString and WinAPI functions. You won't be able to use other MFC functions. Remove CWinApp theApp;, remove AfxWinInit ... — Barmak Shemirani
– Barmak Shemirani, Commented Mar 21, 2016 at 7:29
Just to explain what is going on: std::ostream has an overload for several pointer types. By default, it uses the void const* overload which then prints the hex-formatted address. Now, try to find out to which type your CString converts, e.g. by stepping through it with a debugger. — Ulrich Eckhardt
– Ulrich Eckhardt, Commented Mar 21, 2016 at 7:34

CreativeMind · Accepted Answer · 2016-03-21 07:34:00Z

3

Use following :

std::wcout << temp.GetString();

answered Mar 21, 2016 at 7:34

CreativeMind

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2 Comments

구마왕 Over a year ago

Exactly what I'm looking for !! Thank you, :) But, can I ask you how this change make object to refer real value?

CreativeMind Over a year ago

@구마왕 Internally CString has either char* or wchar*. GetString returns const wchar_t* and that works with wcout.

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