#define __STDC_WANT_LIB_EXT1__ 1
#include <stdio.h>

void main()
{
    errno_t rc;
    FILE    *TempFile;

    rc = tmpfile_s( &TempFile );
    if( rc == 0 ) {
        /* . */
        /* . */
        /* . */
        fclose( TempFile );
    }
}