/C++/How to get size of 2d vector in c++

How to get size of 2d vector in c++

How to make a 2d vector in c++

// Create a vector containing n 
//vectors of size m, all u=initialized with 0
vector<vector<int> > vec( n , vector<int> (m, 0));

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

Initialising 2d vector

// Initializing 2D vector "vect" with 
// values 
vector<vector<int> > vect{ { 1, 2, 3 }, 
                           { 4, 5, 6 }, 
                           { 7, 8, 9 } };

Size of a matrix using vector c++

// finding size of a square matrix
myVector[0].size();

Source: stackoverflow.com

Similar codes

0 vote182 views2 answers
Css window id
C++
0 vote186 views1 answer
Define type c++
C++
0 vote193 views1 answer
Your age doubled is: xx where x is the users age doubled. (print answer with no decimal places)
C++
0 vote200 views1 answer
Powershell script query mssql windows authentication
C++
0 vote179 views1 answer
Get index by pointer to element of vector c++
C++
0 vote222 views1 answer
C++ delete int
C++
-1 vote202 views1 answer
How to pass arrays by reference c++
C++
1 vote264 views1 answer
Multithreading
C++
18 votes204 views3 answers
Sort(arr arr+n) in c++
C++
0 vote241 views1 answer
*= c++
C++