为窗口程序添加控制台

第一步：添加头文件 RedirectIOToConsole.h

内容如下：

#include "stdafx.h"
#include <stdio.h>
#include <fcntl.h>
#include <io.h>
#include <iostream>
#include <fstream>
#include <iostream>
#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();

第二步：添加程序文件 RedirectIOToConsole.cpp

内容如下：

#include "stdafx.h"
#include "RedirectIOToConsole.h"
void RedirectIOToConsole()
{
int hConHandle;
long 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 = (long)GetStdHandle(STD_OUTPUT_HANDLE);
hConHandle = _open_osfhandle(lStdHandle, _O_TEXT);
fp = _fdopen( hConHandle, "w" );
*stdout = *fp;
setvbuf( stdout, NULL, _IONBF, 0 );
// redirect unbuffered STDIN to the console
lStdHandle = (long)GetStdHandle(STD_INPUT_HANDLE);
hConHandle = _open_osfhandle(lStdHandle, _O_TEXT);
fp = _fdopen( hConHandle, "r" );
*stdin = *fp;
setvbuf( stdin, NULL, _IONBF, 0 );
// redirect unbuffered STDERR to the console
lStdHandle = (long)GetStdHandle(STD_ERROR_HANDLE);
hConHandle = _open_osfhandle(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();
}

第三步：在窗口程序中包含刚才创建的头文件：

//////////////////////////////////////////////////
#include "RedirectIOToConsole.h"
//////////////////////////////////////////////////

第四步：在窗口程序初始化过程中调用RedirectIOToConsole()函数：

////////////////////////////////////////////
RedirectIOToConsole();
////////////////////////////////////////////