2d vector c++ declaration
vector< vector<int>> a(rows, vector<int> (cols));2d vector c++ declaration
vector< vector<int>> a(rows, vector<int> (cols));how to create 2d array using vector in c++
vector<vector<int>> vec(N, vector<int> (M, INT_MAX));
Explanation::
vector<vector<int>> -- will take the formed container
N -- Think like row of 2d Matrix
vector<int> (M, INT_MAX) -- In each row, there is again a vector associated with it,
that will formed 2d array.how to get size of 2d vector in c++
myVector[
Vector[0, 4, 2, 5],
Vector[1, 4, 2]
];
/*When you call for myVector[1].size() it would return 3 and [0] would return 4.
For the amount of rows (int vectors) in the 2d vector, you can just use myVector.size()
You can run this to see it in actions*/Copyright © 2021 Codeinu
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