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tmpfile()                Create a Temporary File

 #include   <stdio.h>

 FILE       *tmpfile(void);              Pointer to file structure

    tmpfile() creates a temporary file and returns a pointer to that
    file.  The temporary file is opened in "w+" mode (opened for reading
    and writing).  If not closed by a call to rmtmp(), the temporary file
    is automatically closed when the program terminates normally.

    Returns:    A pointer to the file, if successful, or a NULL pointer
                if the file cannot be opened.

  -------------------------------- Example ---------------------------------

    The following statements create a temporary file, use the file, and
    then delete it.

         #include <stdio.h>

         FILE *stream;
         char *buffr = "copy this to stream";

         main()
         {
             if ((stream = tmpfile()) != NULL) {
                 fprintf(stream,"%s",buffr);
                 rmtmp();
             }
             else
                 printf("unable to open temporary file\n");
         }