c++ multidimensional array code example

Example 1: loop over multidimensional array c++

int arr[2][3] = {
  {1,2,3}, 
  {4,5,6}
};
for(int i=0 ; i<sizeof(arr) / sizeof(arr[0]) ; i++){
	for(int j=0 ; j<sizeof(arr[i])/sizeof(arr[i][0]) ; j++){
		cout<<"2D array have: "<< arr[i][j]<<endl;
	}
}

Example 2: three dimensional array c++

// Two dimensional array
int a[2][3]= {
        {1, 2, 3},
        {4, 5, 6}
    };
    
    cout << a[1][1]; // Output is 5

// Three dimensional array
//[2] is elements; [3] is rows in elements; [4] is column in elemnents 
int a[2][3][2]= {
        //Element 0
        { {1, 2}, 
          {2, 3}, 
          {4, 5} 
            
        },
        
        
        // Element 1
        { {6, 7}, 
          {8, 9}, 
          {10, 11} 
            
        }
    };
    
    cout << a[0][1][1]; // Prints 3

Example 3: c++ code to write 2d array

#include <iostream>
using namespace std;
int main(){
	int n,m;
	int a[n][m];
	cin >> n >>m;
	for ( int i=0; i<n; i++){
		for (int j=0; j<m; j++){
			cin >> a[i][j];
		}
	}
	
	for ( int x=0; x<n; x++){
		for (int y=0; y<m; y++){
			cout << "a[" << x << "][" << y << "]: ";
			cout << a[x][y] << endl;
		}
	}
	return 0;
}

Example 4: get elements of 2d array c++

#include <array>
2 #include <iostream>
3
4 using namespace std;
5
6 //remember const!
7 const int ROWS = 2;
8 const int COLS = 3;
9
10 void printMatrix(array<array<int, COLS>, ROWS> matrix){
11 //for each row
12 for (int row = 0; row < matrix.size(); ++row){
13 //for each element in the current row
14 for (int col = 0; col < matrix[row].size(); ++col){
15 cout << matrix[row][col] << ' ';
16 }
17 cout << endl;
18 }
19 }

Example 5: multidimensional array c++

int MyArray[2][3] = { {2, 3, 4}, {12, 13, 14} };

	//visualize
	//2, 3, 4
	//12, 13, 14

	std::cout << MyArray[0][2] << endl; // 4
	std::cout << MyArray[1][1] << endl; // 13

//First square bracket means how many rows you want in your array
//Second squire bracket is for how many qulam you want in your array