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conversions & pumping lemma cpsc 388 fall 2001 ellen walker hiram college for every r.e. there is a dfa... if we can construct an nfa, that’s good enough prove by induction:…
introduction cpsc 388 ellen walker hiram college why learn about compilers? practical application of important computer science theory ties together computer architecture…
scanning & flex cpsc 388 ellen walker hiram college scanning (review) input: characters from the source code output: tokens keywords: if, then, else, for ⦠symbols:…
slide 1semantic analysis cpsc 388 ellen walker hiram college slide 2 syntax vs. semantics syntax: completely described by cfg –correct keywords, matched parentheses, etc.…
learning cpsc 386 artificial intelligence ellen walker hiram college what is learning? process which changes a system to enable it to do the same task or tasks drawn from…
slide 1 recursion ellen walker cpsc 201 data structures hiram college slide 2 divide & conquer to solve a big problem, break it down into smaller problems examples: –find…
slide 1search cpsc 386 artificial intelligence ellen walker hiram college slide 2 problem solving agent goal-based agent (next slide) must find sequence of actions that will…
slide 1logic cpsc 386 artificial intelligence ellen walker hiram college slide 2 knowledge based agents representation –how is the knowledge stored by the agent? –procedural…
trees ellen walker cpsc 201 data structures hiram college adt’s we’ve studied position-oriented adt –list –stack –queue value-oriented adt –sorted list all of…
introduction ellen walker cpsc 201 data structures hiram college data structures toolkit for programmers abstract data types: list, queue, stack, tree, graph algorithms to…
lists ellen walker cpsc 201 data structures hiram college what is a list (abstract)? sequence of objects objects are in order there is a first object there is a last object…
lr(k) parsing cpsc 388 ellen walker hiram college bottom up parsing start with tokens build up rule rhs (right side) replace rhs by lhs done when stack is only start symbol…
slide 1 balanced trees ellen walker cpsc 201 data structures hiram college slide 2 search tree efficiency the average time to search a binary tree is the average path length…
introduction to normalization cpsc 356 database ellen walker hiram college building a schema start with a list of all attributes, considered as if you had a giant flat database…
slide 1 fuzzy logic cpsc 386 artificial intelligence ellen walker hiram college slide 2 why fuzzy? imprecision better approximates human reasoning –it is warm today. 65…
symbols and type-checking cpsc 388 ellen walker hiram college symbol table is central for scanning & parsing distinguish “identifier” vs. “keyword” tree “decorations”…
implementing stacks ellen walker cpsc 201 data structures hiram college operations on a stack create an empty stack is the stack empty? add a new item to the stack. (push)…
pipelining: implementation cpsc 252 computer organization ellen walker hiram college outline • datapath ignoring hazards • control ignoring hazards • data…
slide 1 arithmetic for computers cpsc 252 computer organization ellen walker, hiram college slide 2 encoding numbers two symbols (1 vs. 0) –binary logic easiest to implement…
assembly language programming cpsc 252 computer organization ellen walker, hiram college instruction set design complex and powerful enough to enable any computation âsimplicity…