If you're up to getting to grips with Qt, the QString class has a comprehensive range of extra methods that don't feature in std::string. One of these is split(). The advantage of this method is...

I should indeed! Touché! :)

In the instance under discussion here, vector <int> my_vec; would be the ticket.

I know that you're just starting out and doing these things as exercises, but if you want a simple and practical way to do this, then I'd use an STL vector instead of a C-style array. You need to...

Does this also apply to lists?

Hi, this might be a quick question, if anyone "just knows" the answers.

I want to know a little about the differences between lists and vectors. For example, I think that the elements of a...

Hmm... I'm still not that sure what you're trying to do, but if I wanted to go through a list of all lower case alphabet possibilities for, say, a 3-letter word, then I might go for something like
...

This seems like a good start to me. The bit for actually doing stuff is mostly about checking that the inputs are sensible. If you want to get input like you suggest, i.e. add 2 grey then you should...

What have you attempted already?
If you haven't done anything yet, then you could start by using a strategy like reading in the file to a string and then change the element of the string that you...

Sorry, I think I was posting that reply as you were posting yours. Glad you fixed your code :-)

on line 1 you have

char* temp=""; //Temp value to hold strings

but, I think that you should assign this pointer to some memory before you use it, i.e. something like

char *temp = new char;...

I think I'm going to use Magic++ instead, it has a much more C++-centric API!

for(int x=2; x < width-1; x++)
for(int y=2; y < height-1; y++) {
sx = convolve_gauss(imgGrey, x, y, mask);
sy = convolve_gauss(imgGrey, x, y, mask);
imgGrey[x][y] = (sx+sy)/2;
...

This isn't a syntax error, the code compiles fine. It also runs, but does not have the desired operation since a statement like 'b' always returns true, hence the error. As you said, it should be...

Yep, the error is caused by the way that you have tried (admirably, but ultimately incorrectly) to catch people trying to use both upper and lower case. The solution given by Lerner should have...

Yep, I'll try this. I couldn't find any suitable images, but I guess I'll just create one with Gimp or something,



Sorry, this is just me using the wrong word. You are, of course, correct. ...

I don't know about your floating point error, but you are wasting a bit of time here. Because of the way this equation for generating the gaussian mask works, the maximum will always be at i = 2, j...

There are a couple of good books that I used. "C++ how to program" by Deitel & Deitel is a good one that I used when I started out. It has lots and lots of code examples in it an should take...

Hi,

Does anyone here have any experience of using libtiff in c++? I have been trying to do some simple image processing using it and I don't seem to be able to write images. I can make files...

As stated by Ancient Dragon, the errors here are pretty well explained by the compiler. However, you appear to be learning from somewhere that uses some old syntax that's not best practice to use...

Do you have a question?