Lecture 4. DefineLang – Global Variables Lecture 4. DefineLang – Global Variables February 1, 2021 Local and Global Variables I Local variable: available based on the scope of the let expression I Global variable: available during the entire iteration with the interpreter I (define Sun 0) I (define a 97) I DefineLang: new feature added […]
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CS 342 Principles of Programming Languages Homework 5 Homework Solutions: FuncLang (Part II) Learning Objectives: 1. Functional programming 2. Understand and expand FuncLang interpreter Instructions: • Total points: 54 pt • Early deadline: Mar 24 (Wed) at 11:59 PM; Regular deadline: Mar 26 (Fri) at 11:59 PM (you can continue working on the homework till
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CS 342 Principles of Programming Languages Homework 8 Homework Solutions: TypeLang Learning Objectives: 1. Understanding and implementing typing rules Instructions: • Total points 66 pt • Early deadline: Apr 14 (Wed) at 11:59 PM; Regular deadline: Apr 16 (Fri) at 11:59 PM (or till TAs start grading the homework) • Download hw8code.zip from Canvas. Interpreter
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CS 342 Principles of Programming Languages Homework 8 Homework: TypeLang Learning Objectives: 1. Understanding, writing, and implementing typing rules 2. TypeLang programming Instructions: • Total points 66 pt • Early deadline: Apr 14 (Wed) at 11:59 PM; Regular deadline: Apr 16 (Fri) at 11:59 PM (or till TAs start grading the homework) • Download hw8code.zip
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CS 342 Principles of Programming Languages Homework 9 Homework: Logic Programming Learning Objectives: 1. Problem solving using logic programming paradigm 2. Prolog programming Instructions: • Total points 36 pt • Early deadline: Apr 21 (Wed) at 11:59 PM; Regular deadline: Apr 23 (Fri) at 11:59 PM (or till TAs start grading the homework) • Download
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Lecture 2. Context Free Grammar Lecture 2. Context Free Grammar January 22, 2021 COM S 342 Principles of Programming Languages @ Iowa State University 1 Overview I what is a grammar I what is a context free grammar (cfg) I relations of strings and grammar I derivation: derive a string from a grammar I parsing:
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CS 342 Principles of Programming Languages Homework 7 Homework Solutions: RefLang Learning Objectives: 1. RefLang programming 2. Understand and expand RefLang interpreter Instructions: • Total points: 48 pt • Early deadline: April 7 (Wed) at 11:59 PM; Regular deadline: April 9 (Fri) at 11:59 PM (you can continue working on the homework till TA starts
COM S 342 final review Exam time: ===== Tue-Thur 9:45am, 2 hours (excluding special accommodation) Open book, open note (review before exam) Canvas Good luck! Friday for questions ===== Questions are based on the following topics: lambda calculus, reflang, typelang, logic programming (high order functions, funclang programming) Type of questions: ● Multiple-choice questions (concepts and
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RefLang: a language about references/pointers RefLang: a language about references/pointers March 11, 2021 Side Effect I Pure functional programs have no side effects: given the same input a functional program would produce the same output. I Side effect: change the state of the program besides its output, i.e.,it can potentially effect other functions and programs.
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Lecture 3. ArithLang – Arithmetics Lecture 3. ArithLang – Arithmetics January 27, 2021 Overview I A language that implements float/integer arithmetic I Design decision: prefix, infix and postfix I Interpreter: Java I Arithlang syntax and semantics, and their implementations Note. Syntax, semantics, design desicisions of ArithLang are taken from the language Scheme. Interpreter Demo Prefix,
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