How to define a structure, C/C++ Programming

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How to Define a Structure?

Structure declarations are rather more complicated than array declarations, ever since a structure must be defined in terms of its individual members. Generally the composition of a structure may be defined as

struct tag
{
member 1;
member 2;
member m;
} g;

In this declaration struct is a necessary keyword tag is a name that identifies structures of this kind (structures having this composition) and member 1, member 2, . . . , member m are individual member declarations.

The individual members are able to be ordinary variables, arrays, pointers or other structures. The member names within a particular structure should be distinct from one another, though a member name is able to be the same as the name of a variable that is defined outside of the structure. A storage class but can't be assigned to an individual member, and individual members can't be initialized inside a structure type declaration. Formerly the composition of the structure has been defined individual structure type variables can declare as follows.

storage-class struct tag variable 1, variable 2,..., variable n;

where
storage-class is an optional storage class specifier,
struct is a required keyword,
tag is the type name that is used in the structure declaration,
variable 1, variable 2,...., variable n are structure variables of type tag


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