====== Lab01 - Introduction to the Computer Laboratory and C Programming Language ======
 
  * Introduction to the computer environment - password settings and eventually ownCloud setup
  * Introduction to the working environment - terminal control and elementary commands: ''ls'', ''cd'', ''pwd'', ''mkdir'', ''cp'', ''mv'', ''rm'', ''touch'', and ''man''. Further commands such as ''locate'', ''cat'', ''hexdump'' and ''find''.
  * Download souces from the 1st lecture {{courses:be5b99cpl:lectures:be5b99cpl-lec01-codes.zip|}}
  * Compile the first program be5b99cpl-lec01-codes/program.c
<code>
clang -Wall -pedantic -std=c99 program.c -o main
</code> 
Or
<code>
gcc -Wall -pedantic -std=c99 program.c -o main
</code>  
 * Compile and executed the program ''lec01/var.c''
  * Setup your working environment, e.g., 
<code>
clang var.c && ./a.out
</code>
   * Test to executed the program as in the lecture example
<code>
clang var.c -o var
./var 
./var; echo $?
./var 1 2 3; echo $?
./var aaa; echo $?
</code>
   * Compile the code with ''-E'' and ''-S'' options
   * Evaluate the executable binary in dynamically and statically linked, use the ''strip'' tool to reduce the program size. Evaluate ''-OS'' compiler flag.
   * Become familiar with your selected favorite editor for editing sources, e.g., gedit, sublime, vim. 

For the ''gedit'', you cannot configure the formatting of the source according to the CPL recommendation coding style using ''clang-format'' using script available in the archive {{courses:be5b99cpl:labs:setup_gedit.zip|}}. You can download the archive, unzip the file, and execute the script as follows:
  
<code>
wget http://cw.fel.cvut.cz/wiki/_media/courses/be5b99cpl/labs/setup_gedit.zip
unzip setup_gedit.zip
./setup_gedit.sh
</code>
   
   
===== Lab tasks =====

   * Test sizes of the numeric data types ''lec01/types.c'', ''lec01/points.c''
   * Write simple macros for defining symbolic constant as a nested expression (using other macros).
   * Evaluate the defined macros defined with and without enclosing brackets
   * Become familiar with the program ''lec01/main_env.c''
   * Write a simple program to parse a single value using ''scanf()'' and report message to ''stdout'' and ''stderr''
   * Write a simple program to parse a sequence of numbers using ''scanf()'' and ''printf()'', read integer values and report average values computed to 2 decimal places.
   * Write a program that reports information about the passed arguments to the program (''argc'', ''argv'')
   * Write a simple program to read characters from ''stdin'' using ''getchar()'' and write them to ''stdout'' using ''putchar()''. Consider the program for copying files.

===== Further tasks =====

Implement programs in exercises and programming Projects of Chapters 2 and 3 of the K.K. King textbook.