In C++, an array is a collection of elements of the same data type stored in contiguous memory locations. Arrays are defined with a fixed size and are accessed using an index.
To declare an array, you specify the data type of its elements, followed by the array name and the number of elements in square brackets.
You can initialize an array at the time of declaration.
Accessing Array Elements
To access an element in an array, you use the array's name and the element's index. The index of an element is a number that represents the element's position in the array. The first element in an array has an index of 0, the second element has an index of 1, and so on.
You can find the number of elements in an array using the sizeof operator.
Iterating Through Arrays
You can use loops to iterate through the elements of an array.
Array Initialization with Zero
If an array is not explicitly initialized, its elements are set to zero by default.
C++ also supports multidimensional arrays. A multidimensional array is an array of arrays. For example, the following statement declares a two-dimensional array of integers:
To access an element in a multidimensional array, you use the array's name and the element's indices. The first index represents the element's position in the outer array, and the second index represents the element's position in the inner array.
The following statement prints the element at the first row and first column of the array my_array to the console:
Here are some additional examples of using arrays in C++:
C++ arrays are a fundamental data structure used to store and manipulate collections of elements. They provide efficient memory usage and are commonly used for tasks involving lists of data, such as storing temperatures for a week or characters in a string. Understanding array indexing, initialization, and iteration is essential for working with arrays in C++.