Question

C语言_access函数怎么用

谢谢
给个网页也行

Answer 1

please check it in MSDN

_access, _waccess
Determine file-access permission.

int _access( const char *path, int mode );

/* ACCESS.C: This example uses _access to check the
* file named "ACCESS.C" to see if it exists and if
* writing is allowed.
*/

#include <io.h>
#include <stdio.h>
#include <stdlib.h>

void main( void )
{
/* Check for existence */
if( (_access( "ACCESS.C", 0 )) != -1 )
{
printf( "File ACCESS.C exists\n" );
/* Check for write permission */
if( (_access( "ACCESS.C", 2 )) != -1 )
printf( "File ACCESS.C has write permission\n" );
}
}

Output

File ACCESS.C exists
File ACCESS.C has write permission

Answer 2

• please check it in MSDN
  
  _access, _waccess
  Determine file-access permission.
  
  int _access( const char *path, int mode );
  
  /* ACCESS.C: This example uses _access to check the
   * file named "ACCESS.C" to see if it exists and if
   * writing is allowed.
   */
  
  #include  <io.h>
  #include  <stdio.h>
  #include  <stdlib.h>
  
  void main( void )
  {
     /* Check for existence */
     if( (_access( "ACCESS.C", 0 )) != -1 )
     {
        printf( "File ACCESS.C exists\n" );
        /* Check for write permission */
        if( (_access( "ACCESS.C", 2 )) != -1 )
           printf( "File ACCESS.C has write permission\n" );
     }
  }
  
  
  Output
  
  File ACCESS.C exists
  File ACCESS.C has write permission