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From: thurmag@jacobs.cs.orst.edu (Gary Thurman)
Newsgroups: comp.lang.c
Subject: fseek() help
Message-ID: <1991May16.212132.24371@lynx.CS.ORST.EDU>
Date: 16 May 91 21:21:32 GMT
Sender: @lynx.CS.ORST.EDU
Organization: Oregon State University, CS Dept.
Lines: 53
Nntp-Posting-Host: jacobs.cs.orst.edu

I thought I had the problem solved (after reading out of 3 books to get this
far), but the following fseek() function still does not work.  The information
I wish to remove from the database file is still present.  Any more idea's as   to what I should try next, would be appreciated.


/* remove a name from the list */

void delete()
{
	FILE *fptr;
	char name[40];
	struct addr addr_info;
	long    file_pos;

	if((fptr=fopen("maillist.dbf","r+b"))==NULL)
	{
		fprintf(stderr,"Can't open, name not found.\n");
		return;
	}

	printf("\n\n\n\n\n\n\t\t\tName your looking for? ");
	gets(name);

	while(!feof(fptr))
	{
                file_pos = ftell (fptr);
		fread(&addr_info,sizeof(struct addr),1,fptr);
		if(!strcmp(addr_info.name, name))
		{
                     printf("\n\n\n\n\n\n\t\t\t\t%s\n", &addr_info.name);
		     printf("\t\t\t\t%s\n", &addr_info.street);
		     printf("\t\t\t\t%s\n", &addr_info.city);
		     printf("\t\t\t\t%s\n", &addr_info.state);
		     printf("\t\t\t\t%s\n", &addr_info.zip);
		     printf("\n\t\tIs this the name you want to remove? (Type 'y' or 'n'):  ");

                     while(getche() == 'y')
                     {
			  addr_info.delete='y';
                          if(fseek(fptr, file_pos, SEEK_SET));
                          fwrite(&addr_info,(long) sizeof(struct addr),1,fptr);
			  clrscr();
			  return;
                     }
	        }
	  } 
	  fclose(fptr);
}
--
        _**_                   "We came...We saw...We kicked some ASH!"
       /____|-IIIIIIIIIIII      Gary Thurman ------ FIREFIGHTER/EMT 2
     >| 132 |-----------\       Email:  thurmag@jacobs.cs.orst.edu
      +-(O)--------(O)--+       Corvallis, Oregon