2D Vector Inside function

Hi CodeGuru ,
In here, i saw that a 2D vector can be created in the following way. It really works .
What if we want to create and initialize a 2D vector inside a function, what should be the syntax ??
Thanks in advance.

Code:

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# include <cliext/vector>

using namespace cliext;
using namespace System;

ref class MyClass {

 public:
    MyClass()
    {
        vector2D = gcnew vector<vector<int>^>(13);
              for(int i=0;i<13;i++)
                  vector2D[i] = gcnew vector<int>(13);
    }

  vector<vector<int>^> ^vector2D ;

} ;

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Do you intend to initialize a class member 2D vector from an arbitrary member function or do you want a 2D vector as a function-local variable? For the former you can just use the proposed syntax for initializing it from the constructor. In this respect the constructor and any other (non-static) member function are equivalent (but note that there are some fundamental aspects where they are not equivalent). For the latter (which I consider to be more likely), unlike the initialization of non-static member variables, you can use the "assign while declaring" initialization syntax; creation of the inner vectors would then be as we already had it:

Code:

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  MyMemberFunction()
  {
    vector<vector<int> ^> ^vector2D = gcnew vector<vector<int> ^>(13);
    for (int i = 0; i < vector2D->size(); ++i)
      vector2D[i] = gcnew vector<int>(13);

    // Do whatever you want...
  }

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