1. CSE-321 Programming Languages Overview POSTECH March 5, 2013 박성우

2. 2 Language = Frame of Thought The language defines the frame of thought. –what you can communicate to others –what concepts you are able to think over Big question: "Does the programming language define the frame of thought in the course of programming?" 自由

3. 3 C Exercise: Integration Specification –input: function f from int to int range a and b –output: f(a) + f(a + 1) +... + f(b) Solution? int integral(int (*f)(int), int a, int b) { int i, sum = 0; for (i = a; i <= b; i++) sum += f(i); return sum; } Question: what if there were no function pointer?

4. 4 C Exercise: Derivative Specification –input: function f from float to float –output: derivative f' of f such that f'(x) = (f(x +  ) - f(x)) /  Solution?

5. 5 Question for You What is your favorite programming language? –Assembly, Basic, Pascal, C, C++, C#, Java, Perl, Python, Ruby, Prolog, Lisp, SML, Haskell, Scheme,... What is its strength? What is its weakness? What is its limitation? Do you think your programming language defines the frame of thought?

6. Course Overview

7. 7 CSE-321 Programming Langauges Course webpage http://www.postech.ac.kr/~gla/cs321 http://www.postech.ac.kr/~gla/cs321 Discussion board –telnet pl.postech.ac.kr, board 321 Anonymous feedback http://pl.postech.ac.kr/~gla/feedback/ http://pl.postech.ac.kr/~gla/feedback/ –Visit POVIS for the reviews on this course Software –Standard ML 110.58 –AFS client software Good news: –No midterm –No final

8. 8 Online Teaching All lecture videos are available on the webpage. Watch the lecture video BEFORE class. In class, we will just discuss what you learned. –I will lead the discussion. –You will ask questions on the lecture. We will have an in-class exam after finishing each topic –1 or 2 exams each week Grading –50% assignments (heart of this course) 8 programming assignments, all in SML –50% in-class exams Absolute grading system

9. 9 No Cheating Read the document on the disciplinary policy. 2006 –7 students cheated (out of 46 students) –2 suspicious cases 2011 –5 students cheated (out of 35 students) We will check your programs at the end of the semester. –all your programs + those submitted in the previous years Cheating will not be tolerated. –Cheating will expel you from class and get you an F.

10. 10 Assignment 1 Assignment 1 will be out tonight. –Due at 11:59pm, March 12 (next Tuesday) –Details of the instruction are all in the handout. –If you don't find your handin directory, email gla@postech.ac.kr.

11. 11 Final Words This course is not about: –functional programming, or SML –learning new programming languages –learning the history of programming languages This course is about: –programming language theory –programming language implementation –programming language principle

12. Welcome to CSE-321!