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

/*
  Environment variable TMP=C:\WINDOWS\TEMP
*/
void main()
  {
    char *filename;

    FILE *fp;

    filename = _tempnam( "D:\\TEMP", "_T" );
    if( filename == NULL )
        printf( "Can't obtain temp file name\n" );
    else {
        printf( "Temp file name is %s\n", filename );
        fp = fopen( filename, "w+b" );
        /* . */
        /* . */
        /* . */
        fclose( fp );
        remove( filename );
        free( filename );
    }
  }