In C++, an array of structure and an array within structure are used frequently used for data storage. Although they sound similar, they work pretty differently from each other. In this article, we will discuss the key differences between an array of structures and an array within structures and clarify the confusion.

Array of Structures in C++

An array of structures combines both an array and a structure to handle complex data neatly. Instead of creating many separate variables of structure, we use an array of structures. Each element in this array is a structure on its own and since the array elements are stored continuously in memory, it allows for quick access and makes our program more efficient and straightforward.

Syntax

structName charArrayName[size];

We can also create a multidimensional array to store more structures.

Example

The below example demonstrates the use of an array of structures in C++.

Coordinates of ( x , y ) 1: (2, 4)
Coordinates of ( x , y ) 2: (3, 6)
Coordinates of ( x , y ) 3: (4, 8)

Array Within a Structure in C++

An array within a structure simply means that we can create one or more arrays inside a structure as structure member which can be useful when we want to associate a collection of items within a single structure.

Syntax

structName myVar; // Creates a single variable of structName

Example

The below example demonstrates the use of an array within the structure.

Student Name: Jack
Grades: 85 92 76 81 90 

Difference Between Array of Structures and Array Within a Structure in C++

The below table demonstrates the key differences between an array of structures and an array within structures: