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Comments:
<0> :-)
<1> typedef double (*F) (double x, double y); can anyone explain this to me? what kind of type definition is this?? Is it pointer on a function or what? i just cant get it...
<2> its a pointer to a function.
<1> and how do i reference to this definition??
<2> http://www.newty.de/fpt/fpt.html
<2> maybe that'll help you
<1> ah ok thanks so far
<1> yeah thanks! this was really heplful! got it now
<3> hello I'm learning C.... I have a question.... if I have a number say 12345 how would I write a program to add all the digits together 1+2+3+4+5?
<3> lets say printf("Enter a number\n"); then scanf(%d", &a); then what?
<3> I would appriciate your advice....
<3> can anyone here help me with a simple question?
<4> you should do your own homework
<4> or ask a question about specific problem you are having, that we might answer
<3> I'm trying to teach my self C from scratch
<4> get a book
<3> if I have a number say 12345 how would I write a program to add all the digits together 1+2+3+4+5?
<3> so printf("Enter a number\n");
<4> that's a homework :-P
<3> scanf("%d", &a);
<3> then what?
<5> decompose the number, same as you would on paper.
<3> how would I decompose it in C?
<5> do it on paper first.
<5> then c should be simple.
<6> uv256: how would YOU do it?
<6> (don't think about C now)
<3> :) must be something with arrays... is it not?
<6> well, it depends whether you treat is as a number or string :)
<3> as a number
<3> I want printf to print 15
<4> printf("15"); then!
<3> :) come on...
<3> I would I break a number the user inputs into seperate numbers?
<3> I==How
<6> you mean digits?
<3> yes
<3> sorry about my english
<6> uv256: you add ones, tens, hundreds, thousands..
<3> jv: I don't get it....
<3> I'm pretty new with this
<6> 12345 = 1 * 10000 + 2 * 1000 + 3 * 100 + 4 * 10 + 5
<6> uv256: c is a programming LANGUAGE
<3> I"m getting a headache:)
<6> uv256: that means, you express your ideas using some given set of "words"
<6> uv256: first you have to realise how YOU would do it on paper
<6> uv256: then the rest is easy :)
<3> well on paper it is easy 1+2+3+4+5....
<3> but how do I seperate the digits from one number...?
<6> but you are skipping the step I told you :)
<3> oh
<7> laters
<8> hello
<8> anyone here?
<8> i allocate memory using calloc (so that it fills the memory with 0)
<8> like calloc(1, buffer);
<9> did you have a question?
<8> and if i don't use all the length (buffer), then the free actually segvs
<8> why is this?
<9> no it doesn't.
<8> yes it does
<9> you're freeing something wrong.
<8> no, coz if the buffer's full, there's no segv
<9> show me the code.
<8> ok
<8> http://rafb.net/p/***dfZ69.html
<8> try it with an html for example
<10> hum,.
<8> if u notice something that could be solved in a better way, tell me plz that one too
<8> i'm newbie in c
<9> that's some weird code.
<8> ?
<9> you do realise that you can't do starcat(ret, buf) when you have not allocated space to ret properly.
<9> strcat() even.
<8> i do strdup() for that purpose
<9> strdup("") only allocates 1 byte. how will that fit anything?
<8> so i should allocate the space?
<8> it works, actually
<11> no, it segfaults
<11> thats what you told us
<11> and its wrong
<8> if you comment out the free(buf); line
<8> it works
<11> maybe, but its still wrong
<8> ok, then how should i do it?
<9> it probably "works" because you, by luck, overflow into the calloced buffer.
<11> and if you change *anything* in your memory layout, it may segfault again
<9> you allocate space for ret. if you need more, you use realloc.
<8> ok
<9> also intendtin better would be nice and if you are not on windows, valgrind will help you with memory problems.
<9> indenting even.
<9> I have to say that the "// if" end-comments are very distracting.
<8> ok
<9> and that is the only thing you comment. indentation tells you where things end unless you have pages and pages of deep nesting. it would be a lot more useful to comment what the code actually intends to do.
<8> well, i'll do that
<8> but first i want it to work somehow
<8> realloc returns with what?
<9> it returns a pointer to the new memory area. to which the contents of the old one have been moved.
<9> or NULL, of course. man realloc.
<8> yep
<8> done
<8> thx
<8> hmm, it works now
<8> thank you
<8> any other comments according to the code?
<8> something which could be solved easier?
<9> I haven't actually tried to understand what it is trying to do.
<8> seeks a block in a file
<8> beginning with begin_str, ending with end_str
<9> well, yes, but the actual details are not very readable.
<8> hmm
<8> maybe
<4> is your man page incomplete?
<8> ?
<9> in my opinion, doing "if (foo) bar;" on a single line usually is just confusing. and ever more so when it is used a lot, it seemingly important parts of the algorithm.
<9> it=in
<12> indeed, we should just do "foo && bar;" :)
<9> the names of the variables could be better. "buffer" is not a good name for "length of the buffer". and "length"-variable is the length of end_str, when I would think it refers to buffer, because buffer is a "more important" object here.
<9> buf. not buffer.
<9> see?! :-)
<8> :)
<9> also, if you really want to zero out buf, as on line 84, use memset() instead.
<8> with realloc, it's now unneccessary
<8> or how should i write that world
<8> i always forget:D
<9> unnecessary.
<8> thx;)
<8> lol
<8> so many mistakes in one sentence
<8> world -> word
<9> getc() does not return a char, it returns int.
<9> compile with warnings on.
<9> what is the point of this? (ch = getc(file)) != str[length - 1]
<8> do it while the character is not equal to the last character of str
<9> okay, what happens if str is "foofoo"?
<8> hmm
<8> you're right
<8> -Wall, no warnings here
<9> good.
<9> also you should check if malloc/strdup/realloc/fopen succeed or not. and i is a confusing name for a char* as it is very very commonly an int.
<9> 'nuff said.
<8> well, i'll delete that part, anyway
<10> or iterator
<8> this will parse out some datas from an html table
<8> ****
<8> how can i detect where it drops the segv?
<9> run it under a debugger.
<9> or show the core file to a debugger afterwards.
<13> ciao a tutti
<8> /topic
<8> ciao, btw:D
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