Introduction

CS 251 C Programming Language Spring 2010 Instructor: Dick Lang TA: Joseph Sturtevant

Goals ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

View of Computers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Your Mindset… ,[object Object],[object Object],[object Object],[object Object],[object Object]

Available Programming Languages ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Machine Languages ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Assembly Languages ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

High-level Languages ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Why Program using C ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Textbooks ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Outline of the Course – I ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Outline of the Course – II ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

History- I ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The ENIAC 1946

History- II ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Mark-8 Altair

History- V ,[object Object],[object Object],[object Object],[object Object],[object Object],original IBM PC 1981

Operating System ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Why choose UNIX ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Your First Program ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Preprocessor: interact with input/output of your computer You will see this at the beginning of nearly all programs Tells computer to load file named <stdio.h> <stdio.h> allows standard input/output operations

Your First Program ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Start point of the program Preprocessor: interact with input/output of your computer ,[object Object],[object Object]

Your First Program ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Start point of the program Preprocessor: interact with input/output of your computer Start and finish of function

Your First Program ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Printing a line of Text Start point of the program Preprocessor: interact with input/output of your computer Start and finish of function

Your First Program ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Printing a line of Text Start point of the program Preprocessor: interact with input/output of your computer Start and finish of function New line character

Your First Program ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Printing a line of Text Start point of the program Preprocessor: interact with input/output of your computer Start and finish of function Finish and return value 0 ,[object Object],[object Object]

Comments for programs ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Compiler ,[object Object],[object Object],[object Object],[object Object],[object Object]

Procedure This is your C program. Type the code in any standard text editor, and save it as helloworld.c Type gcc helloworld.c –o helloworld to compile helloworld.c into helloworld using the gcc compiler The gcc compiler generates the corresponding executable code named helloworld . The computer can execute this machine readable code if you type ./helloworld #include <stdio.h> int main() { printf("Hello World"); return 0; } helloworld.c C-compiler 0011 0000 1010 0110 1100 0110 1011 0101 1010 1110 0110 1110 helloworld.exe

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