我是指在能否在计算机的某个文件中找到？

Question

如我想查看strlwr（）的函数体是怎么实现的，要在那个路径下查找呢？或我想查看其它一些参数，如某个函数的具体参数，要去哪找？

Answer 1

安装盘下: VC98\CRT\SRC\STRLWR.C
char * __cdecl _strlwr (
char * string
)
{
#if defined (_WIN32)

int dstlen; /* len of dst string, with null */
unsigned char *dst = NULL; /* destination string */
#if defined (_MT)
int local_lock_flag;
#endif /* defined (_MT) */

if (__lc_handle[LC_CTYPE] == _CLOCALEHANDLE)
{
char *cp; /* traverses string for C locale conversion */

for (cp=string; *cp; ++cp)
{
if ('A' <= *cp && *cp <= 'Z')
*cp += 'a' - 'A';
}

return(string);
} /* C locale */

_lock_locale( local_lock_flag )

#if defined (_MT)

if (__lc_handle[LC_CTYPE] == _CLOCALEHANDLE)
{
char *cp; /* traverses string for C locale conversion */
_unlock_locale( local_lock_flag )

for (cp=string; *cp; ++cp)
{
if ('A' <= *cp && *cp <= 'Z')
*cp += 'a' - 'A';
}

return(string);
} /* C locale */
#endif /* defined (_MT) */

/* Inquire size of dst string */
if (0 == (dstlen = __crtLCMapStringA(__lc_handle[LC_CTYPE], LCMAP_LOWERCASE,
string, -1, NULL, 0, 0, TRUE)))
goto error_cleanup;

/* Allocate space for dst */
if (NULL == (dst = (unsigned char *) _malloc_crt(dstlen*sizeof(unsigned char))))
goto error_cleanup;

/* Map src string to dst string in alternate case */
if (0 == __crtLCMapStringA(__lc_handle[LC_CTYPE], LCMAP_LOWERCASE,
string, -1, dst, dstlen, 0, TRUE))
goto error_cleanup;

/* copy dst string to return string */
strcpy(string, dst);

error_cleanup:
_unlock_locale( local_lock_flag )
_free_crt (dst);

return (string);

#else /* defined (_WIN32) */

char * cp;

for (cp=string; *cp; ++cp)
{
if ('A' <= *cp && *cp <= 'Z')
*cp += 'a' - 'A';
}

return(string);

#endif /* defined (_WIN32) */
}
WR.C

Answer 2

这个在计算机的文件中是没有的，因为这些函数是以库的方式提供的