How to Declare Structures in C

A structure declaration specifies the grouping of variables of different types in a single unit. It simply acts as a template or blueprint that may be used to create structure variables.

The general syntax for declaring a structure in C is:

The declaration starts with the structure header that consists of keyword struct followed by a tag that serves as the structure name. It can be used for creating structure variables. The individual members of the structure are declared and enclosed in curly ({}) braces. The semicolon placed at the end of closing brace marks the end of structure declaration.

For Example:

struct student                        

{

            int rollno ;

            char name [20];

            float marks ;

};

The above declaration declares a structure student. It consist of three members rollno, name and marks of type int, char [ ], and float respectively. The above declaration doesn't define any variable i.e. it doesn't set aside any space in memory. It is merely a specification that represents information about structure. It tells how a structure will look like when it is defined.

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