Practical Guide to STL

// Program: Vector of Vectors Demo
// Purpose: To demonstrate nested STL containers

// #include "stdafx.h" - include if you use pre compiled headers
#include <iostream>
#include <vector>
using namespace std;

typedef vector <int> VEC_INT;

int inp[2][2] = {{1, 1}, {2, 0}};	// Regular 2x2 array to place into the template
int main(int argc, char* argv[])
{
	int i, j;
	vector <VEC_INT> vecvec;
	// if you want to do this in all one step it looks like this:
	// vector <vector <int> > vecvec;
	
	// Fill it in with the array
	VEC_INT v0(inp[0], inp[0]+2);	// passing two pointers for the range of values to be copied to the vector
	VEC_INT v1(inp[1], inp[1]+2);

	vecvec.push_back(v0);
	vecvec.push_back(v1);

	for (i=0; i<2; i++)
	{
		for (j=0; j<2; j++)
		{
			cout << vecvec[i][j] << "  ";
		}
		cout << endl;
	}
	return 0;
}

// Output:
// 1 1
// 2 0