Thread: Reading a text file

Where did the file come from? Did you get the file from your instructor? Did some other program write the file? It really doesn't matter as long as the file remains consistent. This is part of the problems with dealing with user/file input, you must know how the file is laid out in order to process it correctly. Sometimes this involves trial and error, after making an educated guess.

Jim

Originally Posted by jimblumberg

Where did the file come from? Did you get the file from your instructor? Did some other program write the file? It really doesn't matter as long as the file remains consistent. This is part of the problems with dealing with user/file input, you must know how the file is laid out in order to process it correctly. Sometimes this involves trial and error, after making an educated guess.

Jim

My instructor gave me whole work on a pdf, I took it of the pdf and pasted it on my Text Editor on Ubuntu.

Dean.

About the rest of the code, you adviced me to use strcmp to check if the %s we got from the sscanf is a NODE,GRAPH or EDGE, correct ?

Imagine that %s is NODE :

Code:

if (strcmp(Tipo,"NODE"))

From the line in which NODE is I can get the first vertex and it's condition but I can't get his heir since his heir is on the EDGE one.
How to fix this ?

Thanks, Dean.

I don't understand your question. Does each EDGE line correspond to a particular NODE?

Jim

Originally Posted by jimblumberg

I don't understand your question. Does each EDGE line correspond to a particular NODE?

Jim

Kinda.
Each NODE has a vertex with his condition and each vertex is connected with another vertex (that is shown on the EDGES).
For example if we have EDGE 1 5 it means that the vertex 1 is connected with the vertex 5 or in this case that the vertex 5 is vertex 1's heir.

So in the following line: NODE 2 := x1 -x0, is the vertex 2? What is the significance of the :=, x1, -x0?

Jim

Originally Posted by jimblumberg

So in the following line: NODE 2 := x1 -x0, is the vertex 2? What is the significance of the :=, x1, -x0?

Jim

Yeah, in that case we're working with vertex 2.
:= x1 -x0 would be the condition and looking at your .txt vertex 3 would be vertex 2 heir.

It seems to me that you will need some kind of data structure to hold this information. Since you read a text file sequentially you must save the information for later processing. What these structures entail will depend on how the data will be used after you read your file. At the very least you will need a couple of arrays to hold the data points.

Jim

Hmm, so basically I'll have to make a data structure that will have a field for NODES, a field for GRAPH and a field for EDGES and that as it reads the fields, it saves the information on the specific fields.
That's what you mean right ?

Dean.