Array of Arrays in C++

1. C++ Two-Dimensional Arrays
2. Steps to Declare an N-dimensional Array

The multi-dimensional array is a data structure that stores arrays of multiple dimensions. It is an extension of the single-dimensional array, which can store only one dimension.

In C++, a multi-dimensional array is, by definition, an array of arrays that stores homogeneous data in a single block of contiguous memory.

A multi-dimensional array has the same number of rows and columns, but it can have different numbers of columns for each row. The dimensionality refers to the number of axes required to specify the position of any given element within the matrix.

The benefits of using a multi-dimensional array in C++ are that it is easier and more efficient. With this data structure, you will not have to worry about the size of your memory or the number of indices you need for each dimension.

C++ Two-Dimensional Arrays

The two-dimensional array is the most basic type of multi-dimensional array. A list of one-dimensional arrays makes up a two-dimensional array in its basic form.

You would type something like the following to declare a two-dimensional integer array with dimensions x and y:

type arrayName [x] [y];

Where type can be any legal data type recognized by C++, and arrayName is a legal C++ identifier.

Steps to Declare an N-dimensional Array

Declaring an n-dimensional array in C++ is a process of specifying the size of each dimension and the number of elements in it. It is done by following these steps:

Example code:

#include <iostream>
using namespace std;

int main() {
  int demo[3][3] = {{1, 3, 8}, {9, 3, 6}, {2, 4, 7}};
  for (int x = 0; x < 3; ++x) {
    for (int y = 0; y < 3; ++y) {
      cout << "demo[" << x << "][" << y << "] = " << demo[x][y] << endl;
    }
  }
  return 0;
}

Output:

demo[1][2] = 6
demo[2][0] = 2
demo[2][1] = 4
demo[2][2] = 7

Click here to check the working of the code mentioned above.