MFC中重定向stdout,可以使用cout了！

原始出处在:http://www.halcyon.com/~ast/dload/guicon.htm.

我修改了一下，合并成一个头文件guicon.h，在vs2005中调试通过，修改了部分代码以适应64bit的编译，用法就不多说了，只要在使用前调用RedirectIOToConsole()，一次就可以了。很简单的。

#ifndef __GUICON_H__

#define __GUICON_H__

#ifdef _DEBUG

#include <windows.h>

#include <stdio.h>

#include <fcntl.h>

#include <io.h>

#include <iostream>

#include <fstream>

#ifndef _USE_OLD_IOSTREAMS

using namespace std;

#endif

// maximum mumber of lines the output console should have

static const WORD MAX_CONSOLE_LINES = 500;

void RedirectIOToConsole();

void RedirectIOToConsole()

{

int hConHandle;

HANDLE lStdHandle;

CONSOLE_SCREEN_BUFFER_INFO coninfo;

FILE *fp;

// allocate a console for this app

AllocConsole();

// set the screen buffer to be big enough to let us scroll text

GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE),

&coninfo);

coninfo.dwSize.Y = MAX_CONSOLE_LINES;

SetConsoleScreenBufferSize(GetStdHandle(STD_OUTPUT_HANDLE),

coninfo.dwSize);

// redirect unbuffered STDOUT to the console

lStdHandle = GetStdHandle(STD_OUTPUT_HANDLE);

hConHandle = _open_osfhandle((INT_PTR)lStdHandle, _O_TEXT);

fp = _fdopen( hConHandle, "w" );

*stdout = *fp;

setvbuf( stdout, NULL, _IONBF, 0 );

// redirect unbuffered STDIN to the console

lStdHandle = GetStdHandle(STD_INPUT_HANDLE);

hConHandle = _open_osfhandle((INT_PTR)lStdHandle, _O_TEXT);

fp = _fdopen( hConHandle, "r" );

*stdin = *fp;

setvbuf( stdin, NULL, _IONBF, 0 );

// redirect unbuffered STDERR to the console

lStdHandle = GetStdHandle(STD_ERROR_HANDLE);

hConHandle = _open_osfhandle((INT_PTR)lStdHandle, _O_TEXT);

fp = _fdopen( hConHandle, "w" );

*stderr = *fp;

setvbuf( stderr, NULL, _IONBF, 0 );

// make cout, wcout, cin, wcin, wcerr, cerr, wclog and clog

// point to console as well

ios::sync_with_stdio();

}

//End of File

#endif