C++: Making a list of a multidimensional vector

Question

How do I make this work? I tried this, but no bueno. Basically, as it is, it says "for" needs a declaration, meaning there's something going on with the initialization part. I already know how to set one up. I just need to get past this part. However, if anyone can give me an alternative to making a list (or sequence container) of multidimensional arrays, that will be great, too.

#include <list>
#include <vector>
using namespace std;

class MainTetris
{
    /*
        Creating a list of multidimensional vectors to represent each tetris piece.
        Don't plan on dynamically growing them in the game. It's only because
        STL list doesn't hold arrays.
    */

    list<vector< vector<int> > > pieces;

}

I edited in the follow up code to it and an explanation of what happened. @Aniket: Woah, really? That seems so convoluted. Is there a better alternative? — Cdore, Mar 13 '13 at 05:08
Can we see a full example? Do you have the right includes? Do you have a `using namespace std;` somewhere? P.S. Aniket is f-ing with you. — Benjamin Lindley, Mar 13 '13 at 05:14
Please present your *actual* code. the psuedo-code you've presented is useless in helping us figure out your actual problem. Read: copy-paste — Benjamin Lindley, Mar 13 '13 at 05:31
If you've decided to ask a different question, make a new post. Don't replace the text of a completely different question, thereby invalidating that question's answers. — Benjamin Lindley, Mar 13 '13 at 06:12
I edited it because I heard that it's better to edit the question rather than make a new post, but I can do that, too, if I must. — Cdore, Mar 13 '13 at 06:13
You heard wrong. This is now a completely separate question, it belongs in a completely separate post. — Benjamin Lindley, Mar 13 '13 at 06:14
I've rolled back your changes so someone doesn't end up closing your other question as a duplicate of this. — Benjamin Lindley, Mar 13 '13 at 06:51

bottlecap · Answer 1 · 2013-03-13T05:13:26.733

1

You need to separate the angle brackets.

list<vector<vector<int> > > pieces;

Also you are trying to push a vector<int> instead of a vector<vector<int> >

edited Mar 13 '13 at 05:13

answered Mar 13 '13 at 05:07

bottlecap

11
2

I did so, but still the same error of "expecting declaration." – Cdore Mar 13 '13 at 05:10
"Also you are trying to push a vector instead of a vector >" - The single vector is to initialize seven rows. The vector starts out empty, so I need to fill it in before I start being able to use it like a normal array, i.e. vector[0][0]. – Cdore Mar 13 '13 at 05:15
As Benjamin said, that for loop needs to go in a member function. You'll still need to fix the fact that you are pushing the wrong type onto the list though. – bottlecap Mar 13 '13 at 05:28
Ah, so it seems I need to fill up both rows and columns, then. – Cdore Mar 13 '13 at 05:36

score 0 · Answer 2 · edited May 23 '17 at 12:11

0

You can't have a for loop in a class body. It must be in a function. You probably want it in your constructor. Where did you learn to write classes that way? Any introductory book would have covered this fairly early on.

The Definitive C++ Book Guide and List

edited May 23 '17 at 12:11

Community

1
1

answered Mar 13 '13 at 05:19

Benjamin Lindley

101,917
9
204
274

I actually meant for it to be in the constructor. I was just writing on the fly. Been studying a lot of web code lately, so constructors haven't been on my mind till today. lol – Cdore Mar 13 '13 at 05:23
@Cdore: Are you saying that the code you presented was not actually the code you tried to compile? – Benjamin Lindley Mar 13 '13 at 05:27
I'm not compiling any code as of yet. But I do admit that my brain wasn't thinking about constructors since languages such as php and javascript don't care for them. I know how to code in C++, but I've been out of it for a couple of months. – Cdore Mar 13 '13 at 05:31
@Cdore: You're not making any sense. If you're not compiling anything, what program is reporting that your code has an error? – Benjamin Lindley Mar 13 '13 at 05:33
Visual studio's real time error catching. It was a dumb moment for me until I realized that I was still in class initialization scope. – Cdore Mar 13 '13 at 05:35

C++: Making a list of a multidimensional vector

2 Answers2