Explanation:

Multidimensional Arrays in C / C++

Array- Basics

In C/C++, we can define multidimensional arrays in simple words as array of arrays. Data in multidimensional arrays are stored in tabular form (in row major order).

General form of declaring N-dimensional arrays:

data_type array_name[size1][size2]....[sizeN];

data_type: Type of data to be stored in the array.

Here data_type is valid C/C++ data type

array_name: Name of the array

size1, size2,... ,sizeN: Sizes of the dimensions

Examples:

Two dimensional array:

int two_d[10][20];

Three dimensional array:

int three_d[10][20][30];

Size of multidimensional arrays

Total number of elements that can be stored in a multidimensional array can be calculated by multiplying the size of all the dimensions.

For example:

The array int x[10][20] can store total (10*20) = 200 elements.

Similarly array int x[5][10][20] can store total (5*10*20) = 1000 elements.

Two-Dimensional Array

Two – dimensional array is the simplest form of a multidimensional array. We can see a two – dimensional array as an array of one – dimensional array for easier understanding.

The basic form of declaring a two-dimensional array of size x, y:

Syntax:

data_type array_name[x][y];

data_type: Type of data to be stored. Valid C/C++ data type.

We can declare a two dimensional integer array say ‘x’ of size 10,20 as:

int x[10][20];

Elements in two-dimensional arrays are commonly referred by x[i][j] where i is the row number and ‘j’ is the column number.

A two – dimensional array can be seen as a table with ‘x’ rows and ‘y’ columns where the row number ranges from 0 to (x-1) and column number ranges from 0 to (y-1). A two – dimensional array ‘x’ with 3 rows and 3 columns is shown below:

two-d

Initializing Two – Dimensional Arrays: There are two ways in which a Two-Dimensional array can be initialized.

First Method:

int x[3][4] = {0, 1 ,2 ,3 ,4 , 5 , 6 , 7 , 8 , 9 , 10 , 11}

The above array have 3 rows and 4 columns. The elements in the braces from left to right are stored in the table also from left to right. The elements will be filled in the array in the order, first 4 elements from the left in first row, next 4 elements in second row and so on.

Answer:

Answer is in the pic

Explanation:

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