Methods to Initialize Multidimensional Array in C++
We can initialize multidimensional arrays in C++ using the following ways:
- Initialization using Initializer List
- Initialization with Default Values
1. Initialization Using Initializer List
We can initialize the multidimensional arrays using the list initialization as shown:
Initializing 2D Arrays
arr[2][3] = { {1, 2, 3}, {4, 5, 6} };
Initializing 3D Arrays
arr[2][3][2] = { { {1, 2}, {3, 4}, {5, 6} }, { {7, 8}, {9, 10}, {11, 12} } };
Example
C++
// C++ program to illustrate how to initialize the // multidimensional array #include <iostream> using namespace std; int main() { // Declaring a 2D array with 2 rows and 3 columns int arr[2][3] = { { 1, 2, 3 }, { 4, 5, 6 } }; // Declaring a 3D array with 2 rows and 3 columns and 2 // depth int arr1[2][3][2] = { { { 1, 2 }, { 3, 4 }, { 5, 6 } }, { { 7, 8 }, { 9, 10 }, { 11, 12 } } }; // printing 2d array cout << "2D Array: "; for (int i = 0; i < 2; i++) { for (int j = 0; j < 3; j++) { cout << arr[i][j] << " "; } } cout << endl; // printing 2d array cout << "3D Array: "; for (int i = 0; i < 2; i++) { for (int j = 0; j < 3; j++) { for (int k = 0; k < 2; k++) { cout << arr1[i][j][k] << " "; } } } return 0; } |
Output
2D Array: 1 2 3 4 5 6 3D Array: 1 2 3 4 5 6 7 8 9 10 11 12
2. Initialization with Zero
In C++, we can initialize the multidimensional array with a zero in a single statement.
Syntax
arr[2][3] = {0}
Here, all the elements will be initialized with the value zero.
Example
C++
// C++ program to initialize 2D array with zero #include <iostream> using namespace std; int main() { // Declare and initialize a 2D array with 2 rows and 3 // columns int array[2][3] = { 0 }; // Output the values for (int i = 0; i < 2; ++i) { for (int j = 0; j < 3; ++j) { // Output each element of the array cout << array[i][j] << " "; } // Move to the next line after printing each row cout << endl; } return 0; } |
Output
0 0 0 0 0 0
Initialization of Multidimensional Arrays in C++
In C++, multidimensional arrays are the type of arrays that have multiple dimensions, i.e., they can expand in multiple directions. In this article, we will discuss how to initialize the multidimensional arrays in C++.