Todo list

1
To-do list

• Web resources for the course
• Overview of computer system, C, and .NET
  Framework
• Compile and run C program
• How to access Visual Studio.NET
• Overview of lexical and syntax structure of C
• Your first C program - Hello, World
• Use the console

2
Web resources for the course

• Course webpage
• http//www.cs.uiowa.edu/bruell/16S05.html
• My link for this course
• Click instructors link in the course page
• http//www.cs.uiowa.edu/zhihwang/c016

3
Overview of a computer system

• A usable computer system is an integrated set of
  computer hardware devices and associated system
  software.
• Hardware
• processor, memory, hard drives,
• Input keyboard, mouse, webcam,
• Output video/audio cards, monitor, printer, ...
• Software
• Programs running on computers
• operating system (Windows XP, Redhat Linux, Mac
  OS )
• Utility programs editors, compilers, DBMS,
  games,

4
Computer languages

• Machine languages
• A processor can understand only instructions
  represented by binary digits
• e.g. 1101 001 1101 0110 1100 1110 0010 1001
• Different processors have different instruction
  set
• Humans have difficulty writing machine language
• High-level languages (programming languages)
• Allow programmers to write statements that are
  more meaningful
• FORTRAN, COBOL, BASIC, C, C, Java, C,

program in machine language (executable)
Compiler
program in high-level language
Interpreter
execute
5
Compiling of a C program
Processor A code
JIT1
C source code
MSIL Code
C Compiler
Processor B code
JIT2
Processor C code
JIT3
csc.exe
Just-In-Time complier(s)
6
.NET Framework

• Microsofts new-generation platform for
  application development
• Widely varying types of apps. such as
  window-based apps. and web-based apps.
• Two main parts
• Common Language Runtime
• Make code execution easier
• .NET Framework class library
• Make code development easier
• Provide groups(namespaces) of types
• Namespaces to be addressed in this course
• System
• System.Windows.Forms
• System.IO (hopefully)

7
Develop C programs

• Use Visual Studio.NET as development environment
  (recommended)
• Remotely connect to windows server terminal
  services
• Install on you own PC
• Free download from MSDNAA
• Buy from university book store at
• Use .NET Framework SDK
• Include C complier and .NET Framework class
  library
• 1. Use an editor (e.g. notepad) to write C
  source code, for example, foo.cs
• 2. Use command line to compile
• csc foo.cs

8
Lexical structures and Syntax of C
Lexical Analyzer
Syntax Analyzer
tokens
C source code
MSIL
C Compiler
9
C Lexical Structure

• comment
• // This is a hello world program
• / This is a hello world program /
• white space space, tab, line return
• operators - /
• punctuators , ( ), , .
• Literals specific values (integer, string, etc)
• Keywords reserved identifiers by the language
• public, static, class, int, void, for, while,
• Other identifiers
• Analyze this
• int number 345

10
C Syntax

• Grammatical rule to combine tokens into programs
• declarations define a part of a program
• statements control the sequence of the
  execution of a program
• expression compute values

Class declaration
Method declaration
statement
statement