2d array using vector
// CPP program
#include <iostream>
#include <vector>
using namespace std;
int main()
{
int n = 4;
int m = 5;
/*
Create a vector containing "n"
vectors each of size "m".
*/
vector<vector<int>> vec( n , vector<int> (m));
for(int i = 0; i < n; i++)
{
for(int j = 0; j < m; j++)
{
vec[i][j] = j + i + 1;
}
}
for(int i = 0; i < n; i++)
{
for(int j = 0; j < m; j++)
{
cout << vec[i][j] << " ";
}
cout << endl;
}
return 0;
}