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

2 votes334 views2 answers
C++ back()
C++
-1 vote346 views1 answer
How to print items in arduino
C++
0 vote311 views1 answer
C++ cout iostream
C++
2 votes346 views2 answers
C++ int to qstring
C++
0 vote350 views1 answer
Cosnt cast
C++
0 vote313 views1 answer
C++ write to csv file append
C++
1 vote310 views2 answers
Copy string c++
C++
19 votes324 views6 answers
Initialize 2D vector
C++
10 votes307 views2 answers
Last index of string c++
C++
0 vote328 views1 answer
How to adjust and delete memory in c, c++
C++