/*** Using temporary file ***/
#include <stdio.h>

int main(){
   char tmpname[L_tmpnam];
   char text[100];
   char *filename;
   FILE *tmpfp;

   filename = tmpnam(tmpname);
   printf("A temporary file name is: %s\n", tmpname);

/*******************/

   tmpfp = tmpfile();
   if(tmpfp){
      fprintf(tmpfp,"It_is_not_importanat.\n");
      fseek(tmpfp,0L,SEEK_SET);
      fscanf(tmpfp,"%s",text);
      printf("Tempfile contains: %s\n",text);
      fclose(tmpfp);
      }
   else
      fprintf(stderr,"Temporary file problem!\n");

   return 0;
   }