/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

19 votes204 views5 answers
When kotlin
C++
0 vote175 views1 answer
Hello world in c/++
C++
1 vote121 views1 answer
Can we create array inside an array in c++
C++
0 vote168 views1 answer
Square gcode
C++
0 vote167 views1 answer
Flutter text direction auto
C++
8 votes170 views3 answers
Stack implementation using class in c++
C++
0 vote159 views1 answer
Switch cout print with a prameter c++
C++
1 vote177 views2 answers
Convert from hex to decimal c++
C++
0 vote175 views1 answer
Header for INT_MIN
C++
0 vote162 views1 answer
Cmake g++ address sanitizer
C++