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

4 votes365 views3 answers
Std vector random shuffle
C++
8 votes339 views2 answers
Simple c++ program
C++
4 votes326 views1 answer
How to make i/o fast in c++
C++
4 votes338 views4 answers
How to get last element of set in c++
C++
0 vote322 views1 answer
C++ list of pairs
C++
23 votes333 views6 answers
String to number in c++
C++
0 vote330 views1 answer
Checking if a string has only letters cpp
C++
0 vote326 views1 answer
C++ print number not in scientific notation
C++
0 vote331 views1 answer
Flowchart to display factors of a number
C++
0 vote322 views1 answer
Bool nullable to bool c#
C++