CMSC330

Purpose

Consider the following

def sum(x):
  res = 0
  for i in range(x+1):
    res = res + i
  return res
          

int sum(int x){
  int res = 0;
  for (int i = 1; i <= x; i ++){
    res += i;
  }
  return res;
}
          

let rec sum x = 
  if x = 0 then 0 
    else x + (sum (x-1))
          

(define (sum x)
  (if (= x 0) 0
    (+ x (sum (- x 1)))))

Purpose

What is a language?

Why is language important?

How do we design a language?

How do we implement a language?

Is [->+<] a sentence?

Class Times

Time: 010x: 11:00 - 12:15, 020x: 12:30 - 1:45

Notes will be released along with slides

Assignments

• Exams (in-person)
• Projects
• Discussions
• Quizzes
• Lecture Quizzes (online)

Assignments

• Exams (in-person)
• Oct 5
• Nov 9
• Projects
• Discussions
• Quizzes
• Lecture Quizzes (online)

Assignments

• Exams (in-person)
• Projects
• 8 of them
• Submit on Gradescope
• Use Github
• Discussions
• Quizzes
• Lecture Quizzes (online)

Assignments

• Exams (in-person)
• Projects
• Discussions
• Coding exercises
• Project implementation
• Ungraded
• Quizzes
• Lecture Quizzes (online)

Assignments

• Exams (in-person)
• Projects
• Discussions
• Quizzes
• 4 Quizzes
• Dates: 9/15,9/29,10/27,12/8
• Lecture Quizzes (online)

Office Hours

• Cliff: in person (IRB2238)
• TA: IRB1107 (Open area near advising)

Extensions and Absences

• Can submit 24 hours late for a 10% penalty
• Can submit 48 hours late for a 20% penalty
• Can submit 72 hours late for a 30% penalty
• You have five (5) 12-hour tokens to use on any project
• Late penalty will not apply if tokens used
• Any university sick excuse is exempt from this: contact me
• Communication is key: reach out, be reasonable

Syllabus

Common things people miss on syllabus

• Token use
• Good Faith Attempt
• email: [CMSC330]
• Office Hour Debugging
• Excused Absences

Programming languages are like spoken languages

• What is a Language?
• How do we use Language?
• Why do so many languages exist?

Why do so many languages exist?

• Language Features help us express ourselves
• Semantics and Syntax

End Goal

• Make your own programming language
• Combine elements from one language to another