How can I retrieve rows in a text file

I started programing in language C, and I 开发者_如何学Pythonhave some problems with reading text files. Let me explain.

I have one file text which is organized like this :

Tony 
12.23
John
09.45
Tayris
03.99

I would like to retrieve all notes less than ten and display them, but I can't...

Does anybody could help me?

Thanks a lot.

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C provides four functions that can be used to read files from disk:

1. fscanf()

   field oriented function.

2. fgets()

   line oriented function.

3. fgetc()

   character oriented function

4. fread()

   block oriented function.

See this article for more information.

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Check out the fgets function. It will return until (and including) the end of string character (you can strip it from the destination string if you want).

http://people.cs.uchicago.edu/~iancooke/osstuff/ccc.html offers an example:

Here's a more complicated example. Readline() uses fgets() to read up to MAX_LINE - 1 characters into the buffer 'in'. It strips preceding whitespace and returns a pointer to the first non-whitespace character.

 char *Readline(char *in) {
   char *cptr;

   if (cptr = fgets(in, MAX_LINE, stdin)) {
     /* kill preceding whitespace but leave \n 
        so we're guaranteed to have something*/
     while(*cptr == ' ' || *cptr == '\t') {
       cptr++;
     }
     return cptr;    
    } else {
     return 0;
   }
 }

That should be enough I think.