2d vector c++ declaration

vector< vector<int>> a(rows, vector<int> (cols));

Source: stackoverflow.com

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*/

Source: stackoverflow.com

Similar codes

0 vote201 views1 answer
\frac{2}{5}MR^2 typed in c++
C++
4 votes166 views2 answers
Cpp string find all occurence
C++
0 vote199 views1 answer
How to change the icon of an exe in c++
C++
0 vote168 views2 answers
C++ program to convert time in seconds to hours minutes and seconds
C++
0 vote124 views1 answer
Visual studio code terminal keeps closing c++
C++
1 vote205 views1 answer
Two elements with difference K in c++
C++
1 vote163 views1 answer
Check if set contains element c++
C++
-1 vote171 views1 answer
Easy c++ code
C++
0 vote155 views7 answers
C++ convert to assembly language
C++
4 votes162 views1 answer
Eosio multi index secondary index
C++