Computer Science 433
Programming Languages

Fall 2014, The College of Saint Rose

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Agenda

• Announcements
  • Program/Problem Set 8: Datatypes, Expressions and Assignments [HTML] [PDF] continues
• Last words on data types
• Expressions and assignments

Lecture 19 Assignment

Due at the start of class, Monday, November 10.

Please submit answers to these questions in Submission Box under "LA19" or in hard copy by the start of our next class. We will discuss these questions at the start of class, so no late submissions are accepted. Please be sure that your name is clearly indicated in all submissions.

• Write a short program in C, C++, or Java that clearly demonstrates the side effects of the ++. Be sure to check on both preincrement and postincrement modes. Explain in detail in the comments in your program what happens with each ++ and why. (6 points)
• Briefly discuss the relative advantages of Pascal's choice of assignment operator (:=) and equality operator (=) and that in the C-based languages (= and ==, respectively). (4 points)

Terminology

• reference type
• garbage collection
• reference counters
• mark-sweep approach
• type checking
• compatible types
• type error
• strongly typed
• name and structure type equivalence
• expression
• operands
• operator
• arithmetic expression
• side effects
• referential transparency
• overloaded operator
• type conversions/coercions
• narrowing vs. widening conversions
• mixed-mode expressions
• cast
• relational operators
• logical operators
• short-circuit evaluation

Examples

• overflow
• sideeffects

Links

• Overloading Operators from cplusplus.com