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 vote285 views1 answer
C++ watch a variable
C++
1 vote262 views1 answer
C++ initialize static variable
C++
0 vote282 views1 answer
QT form doesn't take changes
C++
0 vote274 views1 answer
F && T || !(T) && F
C++
0 vote349 views1 answer
Is vscode better than sublime
C++
0 vote270 views1 answer
Zsh: segmentation fault ./provided_files.exe erosion X \.
C++
0 vote289 views1 answer
How many months have 31 days
C++
0 vote275 views1 answer
Cpp array init value
C++
0 vote298 views1 answer
Create vector of specific size c++
C++
1 vote271 views1 answer
C++ print variable address
C++