Data Types & Type Checking - Ace

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Record Types• A record is a possibly heterogeneous aggregate of dataelements in which the individual elements are identified bynames.• A record type in Ada:type Emp_Rec_Type is recordFirst: String (1..20);Mid: String (1..10);Last: String (1..20);Hourly_Rate: Float;end record;Emp_Rec: Emp_Rec_Type;Lecture 0632
Record Types• C, C++, C#: supported with the struct data type.– In C++ structures are minor variations on classes.– In C# structures are related to classes, but also quite different.• structures are allocated on the stack (value types).• class objects are allocated on the heap (reference types).– In C++ and C# structures are also used for encapsulation.• Python, Ruby: implemented as hashes.Lecture 0633
Page 1 and 2: Organization of Programming Languag
Page 3 and 4: Primitive Data Types• Integers -
Page 5 and 6: Scalar Types• Scalar types (also
Page 7 and 8: Array Types• An array is an aggre
Page 9 and 10: Array Categories• Conformant Arra
Page 11 and 12: Implementation of Stack Dynamic Arr
Page 13 and 14: Array Categories• Heap-dynamic: b
Page 15 and 16: Array Initialization• Some langua
Page 17 and 18: Slices• A slice is some substruct
Page 19 and 20: Slices Examples in Fortran 95Lectur
Page 21 and 22: Row vs. Column major orderLecture 0
Page 23 and 24: Contiguous vs. Row Pointer layout i
Page 25 and 26: Access Function for a Multi-Dimensi
Page 27 and 28: Character String Types• Character
Page 29 and 30: Strings in Programming Languages•
Page 31: Ada Strings• Static Length:X: Str
Page 35 and 36: Unions: Free (Fortran, C/C++)union
Page 37 and 38: Unions: Discriminated (Algol 68, Ad
Page 39 and 40: Pointer Operations• Two fundament
Page 41 and 42: Problems with Pointers• Dangling
Page 43 and 44: Pointer Arithmetic in C/C++float st
Page 45 and 46: Evaluation of Pointers & References
Page 47 and 48: Type Checking• A type error resul
Page 49 and 50: Strong Typing & Type Coercion• Co

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