Xref: utzoo comp.os.msdos.programmer:2877 alt.msdos.programmer:2358
Path: utzoo!utgpu!cs.utexas.edu!usc!apple!netcom!netcom.UUCP
From: resnicks@netcom.UUCP (Steve Resnick)
Newsgroups: comp.os.msdos.programmer,alt.msdos.programmer
Subject: Re: Turbo C fopen()
Message-ID: <21544@netcom.UUCP>
Date: 21 Jan 91 17:41:15 GMT
Sender: resnicks@netcom.UUCP
Organization: Netcom- The Bay Area's Public Access Unix System {408 241-9760 guest}
Lines: 35

In article <1991Jan21.154432.11941@cbnewsm.att.com> you write:
>
>Hi there people,
>
>	A quick question, I am used to using c programming on a amdahl, but
>	also started working on msdos Turbo-c 1.5. I am having
>problems with reading and writing to a file. I am using a structure of about
>8 to 10 doubles in it.
>
>
>struct empdata {
>	double wages;
>	double	tariff;
>	..
>	..
>
>	double netwages;
>} EmpData;
>
>When I am  writing and reading to a file, a lot of the time I get an fread error
>19 invalid argument. I can figure it out. Does this have something to do
>with using ptr=fopen("DATA","r+b"); . I have never seen  "r+b" before, but maybe
>that is the problem. could somebody explain this r+b and tell me if this is
>my problem.
>

When using fopen(filename,"r+b") you are specifying that the file is to
be opened for reading (and writing), (r specifies read, + specified the 
opposite of the first mode (r)) and b specifies it should be binary rather
than text.  Can you give an example of your fread statement? The fopen
seems to be fine, unless the file doesn't exist.


Cheers!
Steve