Passing 2-D vector to class - c++

Question

This is my attempt at passing a N-D vector of arbitrary element types, inner and outer lengths to a class and printing its contents.
I know there are a few issues but I have not been able to resolve.
How would I assign the arbitrary inner vector length to a variable or set of variables?
I have attempted to pass iterators to the constructor and assign them to member variables (with and without passing the vector) but that has not been successful.
I understand there are libraries for handling matrix objects and other questions which address problems similar to the one posed herein, however, there are unique/fringe scenarios which comprise the motivation for this question.
#include <iostream>
#include <iterator>
#include <vector>
template <typename V, typename I>
class myVec{
private:
I rows;
I cols;
std::vector< std::vector<V> > vec( rows , vector<int> (cols));
public:
myVec(std::vector< std::vector<V> > const &myArr){
vec = myArr;
rows = myArr.size();
cols = myArr[].size();
}
void printVec(){
for(int i = 0; i < vec.size(); i++){
std::cout << "{";
for(int j = 0; j < vec[i].size(); j++){
std::cout << vec[i][j];
}
if (i < vec.size()){
std::cout << "}";
if (i < vec.size()-1){
std::cout << ",";
std::cout << " ";
}
}
}
std::cout << std::endl;
}
};
int main () {
std::vector< std::vector<int> > mainVec = {{1, 2, 4}, {5, 6, 7, 8}, {4, 3, 2, 1, 7}, {8, 7, 6, 5, 9, 3}};
myVec<int, int> vec1 = myVec<int, int>(mainVec);
vec1.printVec();
return 0;

Answer 1

Basic solution that utilizes iterators as previously suggested for the print method. The vector is passed by const ref, how much of an advantage is there to using move assign instead? Index operator overloads and access methods are not included at this time, plan to include exception handling for out of bounds and other cases.
#include <iostream>
#include <vector>
template <typename V>
class myVec{
private:
std::vector< std::vector<V> > vec;
public:
myVec();
explicit myVec(const std::vector< std::vector<V> > &myArr):vec(myArr) {};
explicit myVec(std::vector< std::vector<V> > &&myArr):vec(std::move(myArr)) {};
}
void printVec(){
std::cout << '{';
for(auto& row:vec){
if(&row != &vec.front()) std::cout << ", ";
std::cout << '{';
if(auto cln = row.begin(); cln != row.end()) {
std::cout << *cln;
for(++cln; cln != row.end(); ++cln) std::cout << ", " << *cln;
}
std::cout << '}';
}
std::cout << '}' << std::endl;
}
};
int main () {
std::vector< std::vector<int> > mainVec = {{1, 2, 4}, {5, 6, 7, 8}, {4, 3, 2, 1, 7}, {8, 7, 6, 5, 9, 3}};
myVec<int, int> vec1 = myVec<int, int>(mainVec);
vec1.printVec();
return 0;