6.1 Basics of Structures

• Structure example:

• An optional name called a structure tag may follow the word struct. (ie point)
• The variables named in a structure are called members
• A struct declaration defines a type
• A struct declaration that is not followed by a list of variables reserves no storage, it merely describes a template or the shape of a structure.
• If the declaration is tagged, however, the tag can be used later in definitions of instances of the structure
• ie: struct point pt; defines a variable pt which is a structure of type struct point 
• A member of a particular structure is referred to in an expression by a construction of the form: structure-name.member (ie. point.x )
• Structures can be nested: