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Difference between Structure and Array in C

  • Difficulty Level : Easy
  • Last Updated : 12 Jul, 2021

Array in C

An array is collection of items stored at continuous memory locations. 



Structure in C

A structure is a user defined data type in C/C++. A structure creates a data type that can be used to group items of possibly different types into a single type. 


Difference between Structure and Array 


Array refers to a collection consisting of elements of homogeneous data type.Structure refers to a collection consisting of elements of heterogeneous data type.
Array uses subscripts or “[ ]” (square bracket) for element accessStructure uses “.” (Dot operator) for element access
Array is pointer as it points to the first element of the collection.Structure is not a pointer
Instantiation of Array objects is not possible.Instantiation of Structure objects is possible.
Array size is fixed and is basically the number of elements multiplied by the size of an element.Structure size is not fixed as each element of Structure can be of different type and size.
Bit filed is not possible in an Array.Bit filed is possible in an Structure.
Array declaration is done simply using [] and not any keyword.Structure declaration is done with the help of “struct” keyword.
Arrays is a non-primitive datatypeStructure is a user-defined datatype.
Array traversal and searching is easy and fast.Structure traversal and searching is complex and slow.
data_type array_name[size];struct sruct_name{ data_type1 ele1; data_type2 ele2; };
Array elements are stored in continuous memory locations.Structure elements may or may not be stored in a continuous memory location.
Array elements are accessed by their index number using subscripts.Structure elements are accessed by their names using dot operator.


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