Reading multiple variables from file

[xHoly-Divinity]

Suppose you had a .txt file that looked something like

312
23552
234
62

You are only told what the variables are going to be so for instance, it'll just indicate that there will be four 'int' variables saved in the doc. How would you access these? Is there an ezier way than using 'seek' because seek does it based on bytes. The reason I'm asking is for the CCC, your inputs come from the file. I tried to experiment with the seek and get but couldn't get it quite to work 100%. Thanks

[Cervantes]

I'm not sure I understand your question, but why not just run a for loop from 1 to, in this case, 4, and get your data into an array?

I've done the CCC this works. They tell you exactly what you can expect, and they separate data by line breaks, (usually). get also works based on line breaks, so you're good. Every other programming competition I've done also works this way.

[xHoly-Divinity]

code:

const txtFile : string := "myfile.txt" var docGet : int var doc, x : int open : doc, txtFile, get get : doc, docGet x := docGet close : doc

So if the txt contained lets say the numbers:
18
2939
235

and I wanted to save the third value (in this case 235) to the variable 'x,' what kind of command would I need?

[syntax_error]

sorry i also had a question related to this...............
ummmm when you are reading in text files and your given that there are words serpreted by spaces and on different lines.
Then how would one go by tell the computer to read data in and read it in different lines......
like for example you want to read in only the the second word in a file at each new line how would one go and do something of this sort??

[Cervantes]

xHoly-Divinity:

code:

% open file var x : int get : fileStream, x get : fileStream, x get : fileStream, x

or in general, to get the n'th item into variable x:

code:

% open file var x : int for i : 1 .. n     get : fileStream, x end for

Of course chances are you need all the data in the file, so I don't know why you'd be skipping past all the good stuff at the beginning.

syntax_error: What is your question? Are you trying to get the second word in each line?

code:

% open file % assume file has n lines var arr : array 1 .. n of string for i : 1 .. n     get : filestream, arr (i)     get : filestream, arr (i) end for

Or to get the k'th word:

code:

% open file % assume file has n lines var arr : array 1 .. n of string for i : 1 .. n     for rep : 1 .. k         get : filestream, arr (i)     end for end for

But again, I don't know why you would do this, as you're ignoring a whole lot of good data that you almost certainly need. You usually need all the data they give you in CCC or related problems.

This works because get gets data until a space or newline is encountered. If you want to get data until a new line is encountered (ie. get an entire line at once), use

code:

get : fileStream, x :*

(I hope I got that syntax right. It's been a while.)

[Clayton]

yes you got the syntax right, be be aware that that only works for strings. If you have numerous integers on the same line seperated by whitespace, (if memory serves), you can use a record to get all of those integers in one get. ie:

code:

var test :     record         x, y, z, q, p : int     end record var stream : int open : stream, "test.txt", get get : stream, test

supposing that we have a text file like so:

code:

1 45 7380 23 234 2

test *should* hold the values of [1 45 7380 23 234 2] (each corresponding to a variable within the record). I'm not entirely sure this works, as I'm on Linux currently, so good luck on figuring this out