'Precedence rules' diaporamas de présentation

Chapter 3: Lexical Analysis

Chapter 3: Lexical Analysis. Csci 465. Objectives. Discuss techniques for specifying/implementing Lexical analyzers Examines methods to recognize words in a stream of characters Tokens, Patterns, Lexemes Attributes for Tokens Input Buffering (buffer pairs)

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COMP 110: Introduction to Programming

COMP 110: Introduction to Programming. Tyler Johnson January 26, 2009 MWF 11:00AM-12:15PM Sitterson 014. Announcements. Lab 0 graded. Questions?. Today in COMP 110. Type Casting More Operators Strings Console I/O. From Last Time. Assignment Compatibilities.

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1. Unions 2.Expressions. 3.Operators. 4.Type equivalence. 5.Coercion, casting and conversion.

COMP205 IMPERATIVE LANGUAGES. 9. EXPRESSIONS AND STATEMENTS. 1. Unions 2.Expressions. 3.Operators. 4.Type equivalence. 5.Coercion, casting and conversion. UNIONS.

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CSEB 114: Principle of programming

CSEB 114: Principle of programming. Chapter 4: Basic C Operators. Objectives. In this chapter, you will learn about: Arithmetic operators Unary operators Binary operators Assignment operators Equalities and relational operators Logical operators Conditional operator.

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Stack

Stack. Content. Stack Stack operation Push Pop Stack Representation Array Linked list Applications. Stack.

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Regular Languages and Regular Expressions

Regular Languages and Regular Expressions. Regular languages Inductive definitions Regular expressions syntax semantics. Regular Languages (Regular Expressions). Regular Languages. New language class Elements are languages We will show that this language class is identical to LFSA

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Java Basics - Expressions

Java Basics - Expressions. Literals A literal is a constant value also called a self-defining term Possibilities: Object: null , the only object literal available Boolean: true or false Integer: e.g., 127 , -13 , 42 , or 0 create 32-bit integers

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Arithmetic Expressions

Arithmetic Expressions. Infix form operand operator operand 2+3 or a+b Need precedence rules May use parentheses 4*(3+5) or a*(b+c). Arithmetic Expressions. Postfix form Operator appears after the operands (4+3)*5 : 4 3 + 5 * 4+(3*5) : 4 3 5 * + No precedence rules or parentheses!

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Topological Sort Example

Topological Sort Example. This job consists of 10 tasks with the following precedence rules: Must start with 7, 5, 4 or 9. Task 1 must follow 7. Tasks 3 & 6 must follow both 7 & 5. 8 must follow 6 & 4. 2 must follow 4. 10 must follow 2.

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71 views • 6 slides