Tutorial 1      Lecturer: Craig MacDonald  Tutorial: Mon@10:10am    970915
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CSC 108, Fall 1997                                     Tutorial notes,  T1
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Go slowly and encourage questions at this point.
Get them able to log in.

In lecture I am only up to slide 10.  See my section web page.

SUMMARY OF TOPICS

  o  basic  system  stuff
  o  basic  internet  stuff
  o  basic  environment  stuff.
  o  "how  to  run  programs"  part
  o  questions  on  assnt  1.
  o  How  to  get  A+

BASIC SYSTEM STUFF

  o  Where are keys:  delete/del/arrow/Ctrl/Alt,
     how  to  log  in.
       - Login  :  f108xxxx
       - Passwd  :  [student  number]
       - no  blanks  in  student  number,  password
       - don't  mix  up  O  and  0,  and  l  and  1
       - First  change  password,  Log  off
  o  double-click on icons:  QUIT  Alt-F4 (check this yourself)
  o  disk stuff: Format, Make backups 3 1/2 (2DD or HD)

INTERNET, EMAIL, NEWS, WWW

  o  easy:  point  and  click,  dialogue  boxes,  etc
  o  What  are  email,  news  and  www?
  o  What  are  they  appropriate  for
  o  (email  is  more  private;  news  is  public.)
  o  Info  for  you  about  these:
       - you can read fairly local newsgroups and www pages
       - email is not restricted at all

ENVIRONMENT STUFF

  o  most basic stuff about the environment
     creating a file: program or data
     compiling a program
     executing a program
       - how to get in:
       - moving:  arrow  keys,  mouse,  side  bar
       - File  Edit  Run  ...  Help

	 The environment can be used to create files that contain
	 anything: programs, data files, recipes or email.

HOW TO RUN A PROGRAM

  o  to  do  assignment  1.

/* Program  to  square  a  number from a command line argument */

import java.io.*;
class SquareNumber {
  
  public static void main (String[] args)  {
    double num; // defines the type of num

    //	 define and create a new object of class Double. Double has a
    //	 constructor taking a string argument.

    Double numD = new Double(args[0]);

    //   the doubleValue class method of the Double class returns the
    //   primitive double value field.

    num = numD.doubleValue();

    //   Could do the above in one statement.
    //   num = new Double(args[0]).doubleValue();
    
    System.out.println(num + "  squared  is  " + num*num);

    int i = (int)(num*num); // casting to integer

    System.out.println("the square truncated is " + i);
  }
}

/* OUTPUT
java SquareNumber 3.3
3.3  squared  is  10.889999999999999
the square truncated is 10
*/
          o  handout  "Doing  your  work  in  csc108F"
          o  under "How to prepare your assignments"
             available  SF2304  or  108  folder  in  Engi-
             neering  library.

o  MOST BASIC WAY TO RUN PROGRAMS

       - input from keyboard and output to screen
       - redirecting  from  file,  and/or  to  file
            java MyClass < infile > outfile
       - an  input  file  is  just  another  file.
       - an  output  file  is  just  another  file.
       - input  and  output  files  can  be  printed.

o  questions  on  assnt  1.

o  Login  :  a108xxxx
o  Passwd  :  [Student  number]
o  [open editor or Visual Age for Java]
o  [type  in  program]
o  [click on FILE] & [SAVE AS] dialogue box
o  create  data  file  same  way  then quit