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2 dimensional vector?

Started by Skkra Aug 10, 2002 at 9:17 AM 2 replies 200+ views

Original Post

Aug 10, 2002 at 9:17 AM

I''ve been trying to get a 2 dimensional vector of integers in an array-type format but am not sure how to do this. I know you can do things like: int *words; words = new int[5]; However, you cannot do words = new int[4][4]; because it bombs out. I''ve decided to go with vectors for this because I need something I can resize easily. Does anyone know how to create a 2-d vector period? Doesnt even have to be with pointers. If anyone could help me out I''d be greatly appreciative!!! Thanks, Skkra

mentat

Aug 10, 2002 at 9:36 AM

    
// creation..

int size = 4;
int ** words = 0;
words = new int*[size];
for (int i = 0; i < size; ++i)
  words[i] = new int[size];
  

      
//destruction..

for (int i = 0; i < size; ++i)
  delete []words[i];
delete []words;

[edited by - mentat on August 10, 2002 10:37:12 AM]

SabreMan

127

SabreMan

Aug 10, 2002 at 9:50 AM

    
#include <iostream>

#include <vector>


int main()
{
	std::vector<std::vector<int> > vect_of_vects;
	std::vector<int> vect1;
	vect1.push_back(0);
	vect1.push_back(1);
	vect1.push_back(2);

	vect_of_vects.push_back(vect1);
	// ... you get the picture ...

}

Also, read Marshall Cline's notes on why arrays are evil.

[edited by - SabreMan on August 10, 2002 10:51:18 AM]

Skkra

Author

Skkra

Aug 10, 2002 at 11:35 AM

Thank you very much!

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