考纲要求

13.1 User-defined Data Types

编号	要求
13.1.1	Define and use enumerated types (TYPE ... = (...))
13.1.2	Define and use pointer types (^TypeName)
13.1.3	Define and use record / composite types (TYPE ... DECLARE ... ENDTYPE)
13.1.4	Use variable of a user-defined type in pseudocode
13.1.5	Access fields of a record using dot notation (variable.field)

13.2 File Organisation and Access

编号	要求
13.2.1	Describe serial file organisation (records in arrival order)
13.2.2	Describe sequential file organisation (records in key order)
13.2.3	Describe random file organisation (direct access by key)
13.2.4	Compare advantages and disadvantages of each organisation

13.3 Floating-point Numbers and Hashing

编号	要求
13.3.1	Represent floating-point numbers in binary using mantissa and exponent
13.3.2	Represent negative numbers using two's complement
13.3.3	Perform normalisation of floating-point numbers
13.3.4	Identify overflow and underflow conditions
13.3.5	Apply a hash function to map a key to a storage location
13.3.6	Handle collisions using open addressing / linear probing / chaining