iterator for 2d vector

Question

How to create iterator/s for 2d vector (a vector of vectors)?

Answer 1

You can use auto keyword for such cases:

#include 
#include
using namespace std;

int main() {
    // your code goes here
    vector>v;

    for(int i=0;i<5;i++)
    {
        vector x={1,2,3,4,5};
        v.push_back(x);
    }
    cout<<"-------------------------------------------"< y=v[i];
        for(int j=0;j y=*iterator;
        for(auto itr=y.begin();itr!=y.end();itr++)
        {
            cout<<*itr<<" ";
        }
        cout<