程序代码：

int __cdecl scanf (
        const char *format,
        ...
        )
/*

 * stdin 'SCAN', 'F'ormatted

 */
{
        int retval;

        va_list arglist;

        va_start(arglist, format);

        _ASSERTE(format != NULL);

        _lock_str2(0, stdin);

        retval = (_input(stdin,format,arglist));

        _unlock_str2(0, stdin);

        return(retval);
}