Thread: Trouble reading a Text File

Hello All.

I am having trouble reading data from a text file. I want to read a bit of text, store it (to manipulate later), then do this with each block of text.

Once all the data has been read, (each block seperately), I would like to manipulate the data from each block that has been read. I don't know how to do this and I have spent quite a few days trying to work it out.

Any ideas?

Thanks for your help, any questions please ask.

PS: I am new to this, so be nice.

My code isn't right. I am not doing it right. I do not know what I am doing. I know how to read lets say 4 different numbers from a text file (5 6 30 500), but what I don't know how to do it read Blocks from a text File. Like the example I gave above.

I need to read the text from each block, and do calculations.
I want the program to know there is 2 lines, because the number at the top is how many lines below there is. Then I will be doing simple calculations, 36 * 7 + (how ever many lines there are in that certain block), so for Block 3, 36 * 7 + 36 * 7. I want to save this information, then compare it to another number that will be manually input by a user.

I know how to read the file, I know how to do the calculation, I know how to give the user the option to input the number, and I know how to print it all out.

I have this, but I don't know if it is right:

		for (int i = 0; i < 53; i++)             
 
([B]I have the number 53 there because there is 53 lines of text in the whole file (I do not know if this is right [/B]))
		{
 
			number_of_lines = inFile.nextInt();
			number_left = inFile.nextDouble();
			number_right = inFile.nextDouble();
			number_left = number_left + inFile.nextDouble();
			number_right = number_right + inFile.nextDouble();
 
			if (inFile.next() == null)
			{
		} 
 
		// Calculations
		wage = number_left * number_right;

Sorry about my confusing way of explaining things.

I really don't understand what you are saying. Argh, this is so frustrating.

EDIT: OK I understand now. You are saying my code is reading it as it comes, not line by line. Why have you said use the nextLine() method.

I want it to read from Block 1 until the empty line, or the start of Block 2, and so on.

I am looking online but I can't find anything that makes sense to me.

Sorry if I don't make sense. Please be patient,

EDIT #2: I was thinking if it read all of block 1, do all of the calculations in block 1, then save it as a String. Then do the same for block 2, until the last block. Then maybe I could compare these strings to the "inputted number".
-Does that make sense?

Ok. Thank you. I will try this now and get back to you. Thanks again!

--- Update ---

OK. I sort of understand the nextLine() method.

I need to know how to break a line into two so we can store them as separate variables or strings.

What do you think? Is that possible? Thanks.

--- Update ---

OK. I sort of understand the nextLine() method.

I need to know how to break a line into two so we can store them as separate variables or strings.

What do you think? Is that possible? Thanks.

Thank you Sir. I do appreciate all your help. I will let you know how I get on. Thanks again.

When you mention the split() method, would that mean that I am using array's? Is there anyway of reading the data and assigning each value to a variable to do a calculation for each line considering these variables vary in terms of int's and double's?