The structure is a collection of different datatype variables, grouped together under a single name. It is a heterogeneous collection of data items that share a common name.
Features of structure
It is possible to copy the contents of all structural elements of different data types to another structure variable of its type by using an assignment operator.
To handle complex datatypes, it is possible to create a structure within another structure, which is called nested structures.
It is possible to pass an entire structure, individual elements of structure, and address of structure to a function.
It is possible to create structure pointers.
The general form of structure declaration is as follows −
datatype member1;
struct tagname{
datatype member2;
datatype member n;
};Here,
struct is the keyword.
tagname specifies the name of a structure
member1, member2 specifies the data items that makeup structure.
For example,
struct book{
int pages;
char author [30];
float price;
};Structure variables
There are three ways of declaring structure variables, which are as follows −
Type 1
struct book{
int pages;
char author[30];
float price;
}b;Type 2
struct{
int pages;
char author[30];
float price;
}b;Type 3
struct book{
int pages;
char author[30];
float price;
};
struct book b;