If the size is determined at runtime you need a full fleged dynamic memory version. Something like


#include <iostream>


int **allocs(int x,int y){
int **ret = new int*[x];
for(int...

Just try to do the program,
when its done, it should be clear what should be pointers.

Hi omir
People are normally quite friendly inhere,
but you should ask a specific question.

good luck

Hi I got a code that in pseudo dos something like


ifstream os;
while(os.oef()){
os.getline(buffer,length);
}


If some condition is met,

What would your rule be for definingen when a token/line is invalid?
I would check the the number of tokens in each class is first 2, then 8

Or do you want a more elaborate check?

post your compile errors

Could you try doing a
'ldd libPixyCANopen.so'

I normally wont go into small errors in other peoples posting,
but it should be noted that code::blocks is an ide.
The compiler is most likely(depending on the setup) the mingw compiler. The mingw...

It's shouldn't be necessary to use extern,
generally you have access to all the public variables and function in the symboltable, but only the externed are required to have the same signature, from...

I think it depends on what you are doing with the file.
I've found that the FILE, strtok is by far the fastest way of reading in data.
I've been using flat files, (same number of columns in all...

Yes,
you've added 'delete []', and have to dereference the double pointers.

Thanks for your help again ancient dragon.

Thanks ancient dragon,
the trick was passing a pointer pointer then.

@arkm

The programming problem is simple.
check if a char* contains a trailing slash,
otherwise update the char*, so that...

Hmm thanks for the char[] approach.

But I cant nail down my problem with the updated cstring.
The following code


#include<iostream>
#include<cstring>

void fix_name(char *name){

Hi
I'm having a very basic newbie problem,
The compiler forces me to do a strdup (because of cons correctness),
can I void the extra line in my code, and then I cant seem to update my array
after...

Cheers arkM,

I will for sure look into this.

The avl is not part of the stl right?
So I have to make this one up.


As it is, the lookup map, takes aprox 3-4 gig memory,
I have 8 gig, but...

I'm parsing 900 gig of textfiles
Using std::string as opposed to char* directly from getline,
takes around 40-60% longer.

Thanks for your response.

Is the const_cast necessary because i definded my map as a

typedef std::map <const char*,int> aMap;

instead of

typedef std::map <char*,int> aMap;

Cheers arkM,

I have no idea what happened here...

But the const_cast is not really necessary, is it?

For anyone that cares,
this seems to do the trick.
But it is important that the item decleration is used directly at the assignmen operator


my_map::value_type item = *it;
data.erase(it);...

Yes I know,
this is what I write in my original post.

How do I free the memor, that I've allocated.

It's in the nature of finite precision.
Theres not much you can do about it.

there a basicly two kinds of datatypes.
1. integral
2. float

integral being, int, char, byte etc
floats being,...

Hi,
can anyone tell me why i can't clean up the memory,
and maybe a small solution.

I'm allocing memory with strdup for each key,
but I cant figure out how to erase the key with free.

Before...

What have you included,
this doesn't look like std c++

void initialize_file(Horses temp_array[]) {
string line;
ifstream HorsesFile ("HorsesFile.txt");
if (HorsesFile.is_open()) {
while (! HorsesFile.eof() ) {
getline (HorsesFile,line);
...

Write an example on datainput, and dataoutput,
like


int inPut=1234;
char *output= \\how do I convert 1234 to char*

I think this is an excellent example of why humans shouldnt use automated translation programs. Like babelfish and translate.google.

I understand he wants to write a calculator that uses polish...

So whats the problem?

If you want to read in a matrix you need some considerations.

First of all you need some cind of datastructure to have the data in some datatype.

A int** would be very suitable.

But you need...

I have no ****ing idea what the question is

I don't understand your problem.

Doesn't the 500 line code work?

Is it a design question?

In a general context in c++,
you never have to write a method that does the sorting.
It's a good...

I'm not an expert,
but you should be able to do it.

I think its called an aggregate class
http://en.wikipedia.org/wiki/C%2B%2B_structure#Aggregate_classes

Hi,
Thanks for you reply,
apparently I don't get notified when people reply anymore.
So sorry for the delayed response.

I was using std::string,
But it is ridicously slow compared to char*.
...

What is the ordering?
If you want to sort by the most frequent elements first, then you can use the link given to you.

If you are sorting by some other rule,
you should say what rule that is.

I solved it,
strdup uses malloc,
so whenever you use a these cstring functions,
you should use free and not delete.

Hi thanks for your reply,
but I don't know the syntax for clearing something that has been allocted like


char ***tokens;
(*tokens) = new char*[len];
for(int i=0 ; i<len ; i++)
(*tokens)[i]...

I'm trying to get myself acquainted with memory allocation and deallocation while writing a program that will actually be usefull for me.

The program is a simple datareader, that tries to read a...

when you use new the argument it takes is a size_t
normally everyone is simply using an int since this is enough for most purposes.
the type of size_t is implementation specific, on my computer its...

just out of curiosity,
what does your init method do?

-----------------------------------------
I would do some thinking about the problem before i started coding.

What base do you need to...

Do you just need to use huge integers,
then check the links given by tux4life.

Or is this some kind of school assignment?

What exactly do you want, your question is to general.

If you want to represent a arbitrary integer,
you could use a int array, and only assume you will be using vals from 0-9 on each entry....