Size of a matrix using vector c++

2d vector

#include <bits/stdc++.h>
using namespace std;
int main() 
{
  int rows = 2;
  int cols = 2;
  int val = 1;
  vector< vector<int> > v(rows, vector<int> (cols, val));  /*creates 2d vector “v[rows][cols]” and initializes all elements to “val == 1” (default value is 0)*/
  v[0][0] = 5;
  v[1][1] = 4;
  cout << v[0][0] << endl; //Output: 5cout << v[1][0] << endl; //Output: 1return 0;}

Source: quora.com

Size of a matrix using vector c++

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

Source: stackoverflow.com

Similar codes

0 vote253 views1 answer
Are maps sorted c++
C++
0 vote266 views1 answer
How to input a vector when size is unknown
C++
9 votes229 views1 answer
C++ read file to string
C++
0 vote269 views1 answer
Frequency of a substring in a string c++
C++
5 votes291 views4 answers
Pointers in c++
C++
6 votes257 views2 answers
Precision c++
C++
0 vote266 views1 answer
Vector of int to string c++
C++
30 votes283 views5 answers
Remove value from vector c++
C++
0 vote280 views1 answer
Destiny child
C++
1 vote265 views1 answer
C++ keyboard input
C++