Tuesday, August 23, 2011

Difference between Arrays and Structures in C

Both the arrays and structures are classified as structured data types as they provide a mechanism that enable us to access and manipulate data in a relatively easy manner. But they differ in a number of ways listed in table below:

1. An array is a collection of related data elements of same type. 1. Structure can have elements of different  types
2. An array is a derived data type 2. A structure is a programmer-defined data type
3. Any array behaves like a built-in data types. All we have to do is to declare an array variable and use it. 3. But in the case of structure, first we have to design and declare a data structure before the variable of that type are declared and used.
4. Array allocates static memory and uses index / subscript for accessing elements of the array.4. Structures allocate dynamic memory and uses (.) operator for accessing the member of a structure.
5. Array is a pointer to the first element of it5. Structure is not a pointer
6. Element access takes relatively less time.6. Property access takes relatively large time.


  1. Is it copied?

  2. Umm..... this was pretty useful, but I'm looking for something more specific. I would like to know the differences between an array of structures and normal structures and structures within a structure

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