/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 vote505 views1 answer
Set keybinding for compiling c++ program in neovim
C++
6 votes132 views2 answers
Precision c++
C++
0 vote121 views1 answer
C++ to mips assembly converter
C++
0 vote125 views1 answer
What is the default include path in ubuntu c++
C++
-1 vote135 views1 answer
Ob for nginx.service failed because the control process exited with error code. See "systemctl status nginx.service" and "journalctl -xe" for details.
C++
10 votes81 views3 answers
Namespaces in c++
C++
0 vote114 views2 answers
Accepting multiple values from a function in cpp
C++
1 vote132 views2 answers
Convert from hex to decimal c++
C++
2 votes134 views1 answer
How to use python sleep function on c++
C++
-1 vote134 views1 answer
You don't have an extension for debugging yaml flutter
C++