我的C-Free的conio.h头文件里少了
txetbackground()
window()
这些函数都没有啊，怎么办啊？
下面是我的CONIO.H文件
/*
* conio.h
* This file has no copyright assigned and is placed in the Public Domain.
* This file is a part of the mingw-runtime package.
* No warranty is given; refer to the file DISCLAIMER within the package.
*
* Low level console I/O functions. Pretty please try to use the ANSI
* standard ones if you are writing new code.
*
*/

#ifndef     _CONIO_H_
#define     _CONIO_H_

/* All the headers include this file. */
#include <_mingw.h>

#ifndef RC_INVOKED

#ifdef     __cplusplus
extern "C" {
#endif

_CRTIMP char* __cdecl __MINGW_NOTHROW     _cgets (char*);
_CRTIMP int __cdecl __MINGW_NOTHROW     _cprintf (const char*, ...);
_CRTIMP int __cdecl __MINGW_NOTHROW     _cputs (const char*);
_CRTIMP int __cdecl __MINGW_NOTHROW     _cscanf (char*, ...);

_CRTIMP int __cdecl __MINGW_NOTHROW     _getch (void);
_CRTIMP int __cdecl __MINGW_NOTHROW     _getche (void);
_CRTIMP int __cdecl __MINGW_NOTHROW     _kbhit (void);
_CRTIMP int __cdecl __MINGW_NOTHROW     _putch (int);
_CRTIMP int __cdecl __MINGW_NOTHROW     _ungetch (int);


#ifndef     _NO_OLDNAMES

_CRTIMP int __cdecl __MINGW_NOTHROW     getch (void);
_CRTIMP int __cdecl __MINGW_NOTHROW     getche (void);
_CRTIMP int __cdecl __MINGW_NOTHROW     kbhit (void);
_CRTIMP int __cdecl __MINGW_NOTHROW     putch (int);
_CRTIMP int __cdecl __MINGW_NOTHROW     ungetch (int);

#endif     /* Not _NO_OLDNAMES */


#ifdef     __cplusplus
}
#endif

#endif     /* Not RC_INVOKED */

#endif     /* Not _CONIO_H_ */