Does anyone know how to declare a vector of vectors?
I need to declare a vector for the columns and then a row. Is this the easiest way to do 2-d storage only using vectors?
This is what I have so far and it compiles but will not let me access it with the push_back method:

typedef vector <int> columns;
vector <columns> rows;



Now how would I put information in to these variables?
Thanks

If vector<int> declares a vector of ints, shouldn't vector<vector> declare a vector of vectors? Also, I don't believe you can typedef a vector in the format "vector <int>," where there's a space between "vector" and "<int>", because I'm pretty sure the C language only accepts three fields for the typedef statement. typedef type_to_use name_of_new_type.

__________________
-Aaron

This is how u would declare a 2 dim vector:
vector < <vector <int> >matrix; (make sure you have spaces jus like i did)

altho i do believe that with multidimensional vectors you need to create rows and then assign values with push_back();
for example matrix.push_back(vector <int>()); would create the row
matrix[0] and so on. to assign values: jus go matrix[0].push_back(50); which assigns 50 to matrix[0][0]. You can access the elements in regular fashion: matrix[0][0]; matrix[1][0]; and so on. do some experimenting with this till you are comfortable.