I originally joined this site almost a year ago so i could find out the name of the GUI library that's in most compilers. Didn't get much help back then.

But I hope that will change. I'm making a sudoku game in C++, so obviously I need a matrix (or a vector of vectors, if possible). Also, I could make it text-based, but I'd rather have some graphics. So, I need a matrix library, and a GUI library.

I *thought* that vectors were:

```
#include <vector.h>
...
vector<allocator_type> name(length);
```

But apparently not. And I *thought* that matrices were:

```
#include <matrix.h>
...
matrix<allocator_type> name(xDim,yDim);
```

But apparently my compiler doesn't even *have* the matrix library.

So could somebody help me out? In a nutshell, I'm having trouble with GUI, matrices, and vectors.

(By the way, I'm using Dev-C++ 5 on Windows XP.)