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High Level Language

Lexical Analyser

Syntax Analyser

Code Generator

Code Optimiser

Assembly Code

1) all white space removed

2) all remaining code becomes tokens

3) a symbol table is created for the variables and data types

1) the syntax of the program is checked against the rules

2) an abstract syntax tree is created

3) errors age generated if the code tokens break syntax rules

1) the syntax tree is converted into object conde

object code is similar to assembly code but hasn't had a linker run against it

1) any redundant code is removed in order to improve size and speed