#Computer-Science#CS250#Software

Compiled Languages §

• Compiled languages are high level languages compiled down to machine code that the computer can understand
• Examples
  • Java
  • C
  • Literally almost any programming language, a lot of them are compiled.
  • Python Not python its interpreted
• C is a minimal high level language
  • It has a simple compiler, making it easy to port to a new machine
  • It’s programs demand less of the machine

The compiling process for C

Source Code §

• Source files in C can have…
  • comments // I am a comment
  • preprocessor directives (#include statements)
  • C Code a = 10;
• The C Preprocessor removes all comments and evaluates all directives, resulting in the preprocessed source code

Compiler §

• Compilers in general translate a high level language to the target language
• Each hardware machine design has its own native machine language
• Machine specific assembly language is often an intermediate step, letting you see exactly what’s going on at the computers level

Assembler §

• The assembler at this point converts the assembly language code directly into object code, which the computer can understand

Object Code §

• Hardware machine is an object
• written in machine language, only thing the computer knows