Reading a text file

Hello guys,

I really need your help in here. Please do your best.

I have the following:
---------------------------------------

Code:

Typedef struct textbook { char title[70]; char author[60]; int year; float *price; } TEXTBOOK;

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and I have the following in my (textbook.txt) file:
---------------------------------
2
The Big help
John Green
1988
20.78
Yellow Stone
Jack Ford
1912
19.7
----------------------------------

What I'm trying to do is to create a TEXTBOOK variable and read the data in for each field in that structure. And pass this variable into another function that prints each book with its details in one line. Also, if the first line in the text represent how many are there, so if we have more than 2 the code should get it right.

Please guys, I'm really stuck in here.

Try again without the giant font and I'll take a look.

Quote:

Originally Posted by itsme86

Try again without the giant font and I'll take a look.

I'm using size 3?? is it that bad?

Quote:

Originally Posted by peRFection

I'm using size 3?? is it that bad?

The standard font size is preferred. It's what we're all used to and what we read posts in every day. Why would you choose a larger one?

Anyway, which part of the problem are you stuck on? Do you have code that opens the file? Check out the fopen() function.

You might want to check this forum's policy on homework. Give it a shot, show us your code, explain which part you're stuck on.

Quote:

Originally Posted by itsme86

The standard font size is preferred. It's what we're all used to and what we read posts in every day. Why would you choose a larger one?

Anyway, which part of the problem are you stuck on? Do you have code that opens the file? Check out the fopen() function.

You might want to check this forum's policy on homework. Give it a shot, show us your code, explain which part you're stuck on.

Code:

char array[100]; char line[100]; FILE *f; f = fopen("textbook.txt","r"); if(f == NULL) { printf("Error opening file\n"); return 1; } for(x=0; x<100; x++) line[x] = '\0'; if ( f != NULL ) { x = 0; while ( fgets ( line, sizeof line, f ) != NULL ) { strcpy(array[x], line); x++; /* I'm struggling here, I'm not sure how to store the values of the array into the original struc variable, and not sure how to pass them by reference to the print_textbook(TEXTBOOK textbook ) function !! */ } } fclose(f); return 0;

my comments in the code...

Well, the first line you read in should be the number of books in the file, so I would do something like this:

Code:

if ( f != NULL) { // Get the number of books in the file fgets(line, sizeof(line), f); x = atoi(line); while(x-- > 0) { TEXTBOOK book; // read the title, author, year, and price lines in from the file and store them in book ... // Print the book print_textbook(book); } }

Quote:

Originally Posted by itsme86

Well, the first line you read in should be the number of books in the file, so I would do something like this:

Code:

if ( f != NULL) { // Get the number of books in the file fgets(line, sizeof(line), f); x = atoi(line); while(x-- > 0) { TEXTBOOK book; // read the title, author, year, and price lines in from the file and store them in book ... // Print the book print_textbook(book); } }

Thanks a lot man, but my problem is the storing.... I'm not that expert and not sure how to store them to the struct variable... do we use for example (f.title) when we call the struct variable because each line represent a single varibale..... Thanks

Quote:

Originally Posted by peRFection

Thanks a lot man, but my problem is the storing.... I'm not that expert and not sure how to store them to the struct variable... do we use for example (f.title) when we call the struct variable because each line represent a single varibale..... Thanks

It would be book.member. Like:

Code:

fgets(book.title, sizeof(book.title), f); fgets(book.author, sizeof(book.author), f); fgets(line, sizeof(line), f); book.year = atoi(line);

I'll let you figure out the price one. ;)

One thing to watch out for: the title and author might have '\n' characters at the end which will make the book information print funny. You should probably get rid of them.

Quote:

Originally Posted by itsme86

It would be book.member. Like:

Code:

fgets(book.title, sizeof(book.title), f); fgets(book.author, sizeof(book.author), f); fgets(line, sizeof(line), f); book.year = atoi(line);

I'll let you figure out the price one. ;)

One thing to watch out for: the title and author might have '\n' characters at the end which will make the book information print funny. You should probably get rid of them.

I have two question, whenever I t try to print the title, author, year....... in the printf("") I gets an error, do I have to do use book.member too in the printf because it isn't working. the second question
whenever I try to pass the variables to the print_textbook(book) function, do I have to make another variables such as title, author.......... in that function I'm not getting it man, I'm sorry

Quote:

Originally Posted by itsme86

It would be book.member. Like:

Code:

fgets(book.title, sizeof(book.title), f); fgets(book.author, sizeof(book.author), f); fgets(line, sizeof(line), f); book.year = atoi(line);

I'll let you figure out the price one. ;)

One thing to watch out for: the title and author might have '\n' characters at the end which will make the book information print funny. You should probably get rid of them.

it works at the function itself but not when I pass it to the other function.... you're right the new line misses everything I'm trying to get it away but still no hope..... i hope u can help

I formally request smiting of peRFection from the gods(mods) of this message board for deleting/editing his original post.

Don't do that!!!

:D

Post restored. Please don't delete your posts, it defeats the whole purpose of the forum.