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

3 votes328 views2 answers
Cpp map insert
C++
29 votes290 views6 answers
String to int in c++
C++
-1 vote301 views1 answer
Template function in class c++
C++
0 vote308 views1 answer
Print maximum sum subarray
C++
1 vote362 views1 answer
Uri online judge 1930 solution in c++
C++
22 votes318 views2 answers
DateFormat in Flutter
C++
1 vote349 views3 answers
Print 2d vector c++
C++
0 vote328 views2 answers
Method
C++
0 vote267 views1 answer
Footnote appears in the middle latex
C++
1 vote322 views3 answers
Auto in cpp
C++