Structures in C++ (OOPs)

Structure is the user defined data type which can store heterogeneous data i.e. data of different types. It means in structure member with all possible data type can be used and there is no restriction that elements of the structure are stored at adjacent memory locations. Structure is declared with key word struct followed by its name and then by block. 

Structure of C++ (OOPs) Program

Union in C-language

Union is that data structure which is also user defined data type but to define a union keyword union  is used instead of struct.

Structure in C-language

Structure is the user defined data type which can store heterogeneous data i.e. data of different types. It means in structure member with all possible data type can be used and there is no restriction that elements of the structure are stored at adjacent memory locations. Structure is declared with key word struct followed by its name and then by block.