STRUCTURE

A structure contains a number of data types grouped together. These data types may or may not be of the same type. The following example illustrates the use of this data type.

main( ) {     struct book     {         char name ;         float price ;         int pages ;     } ;     struct book b1, b2, b3 ;     printf ( "\nEnter names, prices & no. of pages of 3 books\n" ) ;     scanf ( "%c %f %d", &b1.name, &b1.price, &b1.pages ) ;     scanf ( "%c %f %d", &b2.name, &b2.price, &b2.pages ) ;     scanf ( "%c %f %d", &b3.name, &b3.price, &b3.pages ) ;     printf ( "\nAnd this is what you entered" ) ;     printf ( "\n%c %f %d", b1.name, b1.price, b1.pages ) ;     printf ( "\n%c %f %d", b2.name, b2.price, b2.pages ) ;     printf ( "\n%c %f %d", b3.name, b3.price, b3.pages ) ; }

And here is the output...
Enter names, prices and no. of pages of 3 books

A 100.00 354 C 256.50 682 F 233.70 512

And this is what you entered

A 100.000000 354 C 256.500000 682 F 233.700000 512

This program demonstrates two fundamental aspects of structures:

(a) declaration of a structure     struct book     {         char name ;         float price ;         int pages ;     } ;     struct book b1, b2, b3 ;

(b) accessing of structure elements     b3.name, b3.price, b3.pages

Source By Let Us C "Yashwant Kanetkar"