main.cpp

#include <iostream>
#include <vector>

int main()
{
	const int r = 3, c = 3;
	std::vector<std::vector<int>> testvec; // Create a vector holding vectors holding ints
	for(int i = 0; i < r; ++i)
	{
		std::vector<int> tempvec; // Create a temporary vector holding ints
		for(int j = 0; j < c; ++j)
		{
			tempvec.push_back(j); // Fill the temporary vector
		}
		testvec.push_back(tempvec); // Push_back the temporary vector into the main vector
	}
	for(auto a : testvec) // Type out the contents of the vectors
	{
		for(auto b : a)
		{
			std::cout << b;
		}
		std::cout << std::endl;
	}
	return 0;
}