Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
?
Solved

Help needed, easy question for experts!

Posted on 2003-11-23
6
Medium Priority
?
301 Views
Last Modified: 2011-08-18
I have this program so far - i need to return an error message if the file entered doesnt exist....

program Project1;

{$APPTYPE CONSOLE}

uses
  SysUtils;

var Input      : text;
      I          : integer;
      Lineoftext : string;
      S : string;

  Begin

  Readln (S);

  Reset(input,S);
  for I:=1 to 10 do begin
  Readln (Input,Lineoftext); {Reading a Lineoftext from input file}
  writeln (Lineoftext);
  end;
  Closefile (Input);
  readln;
  end.


Thanks :)

0
Comment
Question by:jarhys
4 Comments
 
LVL 9

Accepted Solution

by:
ginsonic earned 100 total points
ID: 9805867
Just use FileExists function as:

if not FileExists( S )  then begin
  ShowMessage( 'The file don't exist!' );
  Exit;
end;
0
 
LVL 8

Assisted Solution

by:gmayo
gmayo earned 100 total points
ID: 9805871
if FileExists(LineOfText) then begin
   ...file exists...
   ExitCode := 0;
end else begin
   ... file does not exist...
   ExitCode := 1; // or whatever
end;

It's in the SysUtils unit which you already include.

Geoff M.
0
 
LVL 4

Expert Comment

by:nestorua
ID: 9805931
HI,
You also can use "try..except..end" to catch the error.
Sincerely,
Nestorua.
0
 
LVL 5

Expert Comment

by:DeerBear
ID: 9810056
Hi,

Eventually you can also use FileStream, which would also allow for more
flexybility in your data processing.

HTH,

Andrew
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article explains how to create forms/units independent of other forms/units object names in a delphi project. Have you ever created a form for user input in a Delphi project and then had the need to have that same form in a other Delphi proj…
Objective: - This article will help user in how to convert their numeric value become words. How to use 1. You can copy this code in your Unit as function 2. than you can perform your function by type this code The Code   (CODE) The Im…
Despite its rising prevalence in the business world, "the cloud" is still misunderstood. Some companies still believe common misconceptions about lack of security in cloud solutions and many misuses of cloud storage options still occur every day. …
As many of you are aware about Scanpst.exe utility which is owned by Microsoft itself to repair inaccessible or damaged PST files, but the question is do you really think Scanpst.exe is capable to repair all sorts of PST related corruption issues?
Suggested Courses
Course of the Month10 days, 7 hours left to enroll

571 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question