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how to make a 2d vector in c++

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Tanishq Vyas answered on June 19, 2020 Popularity 10/10 Helpfulness 6/10

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how to make a 2d vector in c++

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// Create a vector containing n 
//vectors of size m, all u=initialized with 0
vector<vector<int> > vec( n , vector<int> (m, 0));

Popularity 10/10 Helpfulness 6/10 Language cpp

Source: Grepper

Tags: 2d-vector c++

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Contributed on Jun 19 2020

Tanishq Vyas

0 Answers Avg Quality 2/10

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2d vector initialization in cpp

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vector<vector<int>> vec( n , vector<int> (m, 0));

where: n is number of ROWS,
	   m is number of COLUMNS
       
So result will be ( Let n = 2, m = 3 )
  	[[ 0, 0, 0],
     [ 0, 0, 0]]
     		   ( 2 x 3 )

Popularity 9/10 Helpfulness 5/10 Language cpp

Source: Grepper

Tags: 2d-vector 2d-v

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Contributed on Jun 25 2022

Concerned Cheetah

0 Answers Avg Quality 2/10

2d vector c++ declaration

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vector< vector<int>> a(rows, vector<int> (cols));

Popularity 10/10 Helpfulness 5/10 Language cpp

Source: stackoverflow.com

Tags: 2d-vector 2d-v

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Contributed on Jan 02 2021

Clumsy Chimpanzee

0 Answers Avg Quality 2/10

2d array using vector

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// CPP program
#include <iostream>
#include <vector>
using namespace std;
int main()
{
    int n = 4;
    int m = 5;
 
    /*
    Create a vector containing "n"
    vectors each of size "m".
    */
    vector<vector<int>> vec( n , vector<int> (m));
 
    for(int i = 0; i < n; i++)
    {
        for(int j = 0; j < m; j++)
        {
            vec[i][j] = j + i + 1;
        }
    }
 
    for(int i = 0; i < n; i++)
    {
        for(int j = 0; j < m; j++)
        {
            cout << vec[i][j] << " ";
        }
        cout << endl;
    }
     
   return 0;
}

Popularity 9/10 Helpfulness 5/10 Language cpp

Source: www.geeksforgeeks.org

Tags: 2d c++

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Contributed on Mar 10 2022

Expensive Earthworm

0 Answers Avg Quality 2/10

create a 2d vector in c++

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// CPP program
#include <iostream>
#include <vector>
using namespace std;
int main()
{
    int n = 3;
    int m = 4;
 
    /*
    We create a 2D vector containing "n"
    elements each having the value "vector<int> (m, 0)".
    "vector<int> (m, 0)" means a vector having "m"
    elements each of value "0".
    Here these elements are vectors.
    */
    vector<vector<int>> vec( n , vector<int> (m, 0));
 
    for(int i = 0; i < n; i++)
    {
        for(int j = 0; j < m; j++)
        {
            cout << vec[i][j] << " ";
        }
        cout<< endl;
    }
     
    return 0;
}

Popularity 10/10 Helpfulness 4/10 Language cpp

Source: www.geeksforgeeks.org

Tags: 2d-vector 2d-v

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Contributed on Mar 09 2022

pranav bansal

0 Answers Avg Quality 2/10

2D vector in cpp

Comment

// CPP program
#include <iostream>
#include <vector>
using namespace std;
int main()
{
    int n = 3;
    int m = 4;
  
    /*
    We create a 2D vector containing "n"
    elements each having the value "vector<int> (m, 0)".
    "vector<int> (m, 0)" means a vector having "m"
    elements each of value "0".
    Here these elements are vectors.
    */
    vector<vector<int>> vec( n , vector<int> (m, 0)); 
  
    for(int i = 0; i < n; i++)
    {
        for(int j = 0; j < m; j++)
        {
            cout << vec[i][j] << " ";
        }
        cout<< endl;
    }
      
    return 0;
}

Popularity 10/10 Helpfulness 4/10 Language cpp

Source: www.geeksforgeeks.org

Tags: 2d-vector 2d-v

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Contributed on Sep 26 2022

Sleepy Head

0 Answers Avg Quality 2/10

2D vector in cpp

Comment

// CPP program
#include <iostream>
#include <vector>
using namespace std;
int main()
{
    int n = 3;
    int m = 4;
  
    /*
    We create a 2D vector containing "n"
    elements each having the value "vector<int> (m, 0)".
    "vector<int> (m, 0)" means a vector having "m"
    elements each of value "0".
    Here these elements are vectors.
    */
    vector<vector<int>> vec( n , vector<int> (m, 0)); 
  
    for(int i = 0; i < n; i++)
    {
        for(int j = 0; j < m; j++)
        {
            cout << vec[i][j] << " ";
        }
        cout<< endl;
    }
      
    return 0;
}

Popularity 10/10 Helpfulness 4/10 Language cpp

Source: www.geeksforgeeks.org

Tags: 2d-vector 2d-v

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Contributed on Sep 26 2022

Sleepy Head

0 Answers Avg Quality 2/10

how to create 2d array using vector in c++

Comment

vector<vector<int>> vec(N, vector<int> (M, INT_MAX));

Explanation::
vector<vector<int>> -- will take the formed container
N -- Think like row of 2d Matrix
vector<int> (M, INT_MAX) -- In each row, there is again a vector associated with it, 
that will formed 2d array.

Popularity 10/10 Helpfulness 3/10 Language cpp

Source: Grepper

Tags: 2d 2

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Contributed on Jul 13 2021

Viper

0 Answers Avg Quality 2/10

how to make a 2d vector in c++

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