/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

-1 vote160 views1 answer
Error: Microsoft Visual C++ 14.0 is required. Get it with "Build Tools for Visual Studio": https://visualstudio.microsoft.com/downloads/
C++
10 votes161 views2 answers
C++ convert binary string to decimal
C++
1 vote159 views1 answer
Remove () not working c++
C++
1 vote163 views1 answer
Chrono start time in c++
C++
0 vote169 views1 answer
Argument to number C++
C++
0 vote170 views2 answers
Shortest path in unweighted graph bfs
C++
0 vote160 views1 answer
C++ void to avoid functions
C++
4 votes182 views2 answers
Input pdf latex
C++
0 vote165 views1 answer
How to rotate canvas android
C++
0 vote169 views1 answer
Sort vector of pair c++
C++