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

2 votes168 views4 answers
Substring in c++
C++
0 vote167 views2 answers
C++ namespace example
C++
0 vote168 views2 answers
Total sales in array c++ two dimensional array
C++
1 vote163 views1 answer
Cpp when use size_t
C++
12 votes165 views1 answer
Create copy constructor c++
C++
0 vote163 views1 answer
3. The method indexOf, part of the List interface, returns the index of the first occurrence of an object in a List. What does the following code fragment do?
C++
0 vote165 views1 answer
PI IN C++ WITH CMATH
C++
0 vote172 views1 answer
Traverse string in cpp
C++
0 vote179 views1 answer
Use set to get duplicates in c++
C++
0 vote174 views1 answer
Check if a variable is tring c++
C++