Comments by Quirkafleeg (Top 26 by date)

OK - You should set a result, e.g. int result = chdir(str) and check the value of errno if result is -1. The errno is just another integer that you can output to the console. For more detail on which error values are returned, consult http://linux.die.net/man/2/chdir

Unfortunately, the use of the 'z' in "please" generally negates help from the majority - but I applaud you for limiting yourself to just 1.

Two problems:
1) You cannot set str1[400] - str1 is an array from 0 to 399,
2) You cannot set a character from an entire string - you need to use strcpy instead

What is the problem? You should get back 0 or -1 from chdir... then use errno to find out what the actual error code should be. This will give an idea as to what is happening.

The problem with this is hard to diagnose. Your variable names remind me of horror stories that I've been told about 30 year old code; you are allowed - and recommended - to give your variables meaningful names, rather single letters.

For example, the parameters "k" and "n" do not help anyone here scan your code for immediate issues. What it does instead is force us to spend more time than we should examining (and decrypting) the code.
Most of us are either too busy or too lazy to do that.

I am probably similar to a number of users by a being averse to having to download things (which is what your hyperlink asks me to do!) - it adds to the "we are having to spend far more time on this than we should" argument.

What also makes it difficult is the other functions that this code calls - there is no code snippets of these functions. As such, when you say "It not worky!", there is no evidence to show what the expected output and the actual output is.
From what I can see, the code snippet seemingly has no problems - the real problem may lie in the code you have not posted, e.g. "Horizontally" or "Vertically" (do these change the value of count?)

So I am sorry to sound harsh, but I cannot help you without at least more code logic - and I'm guessing other people would post a similar request.

Only a 2...
What happens when you type 'a'? A FormatException error.

"Programmers need to learn how stupid customers can be"

+5. A rare occasion when a C++ question is answered using C++, rather than C!

2 things:
1) The title says vector to stream, whereas the description says vector to string. Which is it?
2) A vector of what?

Agreed. C/C++ programmers should learn what "definition" and "declaration" mean - which begs the question of why create a forward declaration of "do_var_fun", when the definition could easily have been moved above "main"?

A deque should be the preferred option to a list.

Heed the advice of lewax00... THE most common problem in any commercial C++ project are memory leaks. If you are happy to program with bad habits then you are just asking for a painful future for you and all work colleagues.

Also the final for loop with "j" should be "j >= 0", not "j > 0" - unless you want to ignore the first element.

If you're going to use the C++ string, why use a C function?

...and this was the polite reply! Personally, the solutions giyf and lmgtfy are best.

I think the first thing you need to do is learn what arrays can do...
I grant bravery for publishing it, but creating 300 variables kind of shows that you may not be ready to handle either socket or multi-threaded programming just yet.

Hint: What do you return after you've handled the exception?

...and with a different string of, say "11.98677"?