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https://github.com/honghaoz/use-console-in-mfc

Use console in MFC
https://github.com/honghaoz/use-console-in-mfc

Last synced: 27 days ago
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Use console in MFC

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Using Console in MFC
=====================

**例如一个对话框程序。**

```
BOOL CTDlg::OnInitDialog()
{
::AllocConsole(); // 打开控制台资源
freopen("CONOUT$", "w+t", stdout); // 申请写
freopen("CONIN$","r+t",stdin);
}
```

**然后在需要用到的地方添加这段代码:**

```
#ifndef __GUICON_H__
#define __GUICON_H__
#include
#include
#include
#include
#include
#include
using namespace std;

// 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();
}
#endif
```
**然后就可以用cout在console里输出了。**

**最后,记得在结束程序前释放掉。**

```
AllocConsole();
freopen("CONOUT$","w+t",stdout);
freopen("CONIN$","r+t",stdin);
cout << "Input:" <> iTest;
fclose(stdout);
fclose(stdin);
FreeConsole();
```

_Reference:_