Dr.  Dichter							                     Fall 2000
Handout 2						       University of Bridgeport


This handout will go through the process of how to create, compile, and run the same program, sayTest, as handout 1. 
In UNIX, you need the help of some editor. A common one is vi, although it is not necessarily the easiest to with 
which to start. However, the basics of vi are fairly easy. Another simple editor on UNIX is pico. 

The lab instructor will help you in selecting and using a UNIX editor on our Solaris workstation. 

The first thing you need to do is to log in to our system. Once you log in, you are by default in your home directory. 
The lab instructor will guide you to using simple commands, such as pwd, cd, mkdir, cd .., ls. 

In addition, you become familiar with our C++ compiler, g++. 

Here we check the location of the current directory. It shows it is my home directory ( /home/dichter ), and 
then in a subdirectory program1, and another one called say. 



axon% pwd
/home/dichter/cs101/program1/say


Here, we do a directory listing ( all files, long listing )


axon% ls -al
total 687
drwx------   2 dichter       512 Aug 31 14:04 .
drwxr-xr-x   4 dichter       512 Sep  1  1999 ..
-rw-------   1 dichter      1031 Aug 31 14:04 .nfs2138
-rw-------   1 dichter       288 Sep  1  1999 Talker.cpp
-rw-------   1 dichter       126 Sep  1  1999 Talker.h
-rwx------   1 dichter    680724 Sep  1  1999 a.out
-rw-------   1 dichter         0 Aug 31 14:04 done
-rw-------   1 dichter       187 Sep  1  1999 sayTest.cpp



Here, we compile only  ( -c ) the source code Talker.cpp.


axon% g++ -c Talker.cpp


The directory listing below shows a new file Talker.o. This file is generated by the compile above.

axon% ls -al

total 690
drwx------   2 dichter       512 Aug 31 14:05 .
drwxr-xr-x   4 dichter       512 Sep  1  1999 ..
-rw-------   1 dichter      1031 Aug 31 14:04 .nfs2138
-rw-------   1 dichter       288 Sep  1  1999 Talker.cpp
-rw-------   1 dichter       126 Sep  1  1999 Talker.h
-rw-------   1 dichter      2248 Aug 31 14:05 Talker.o
-rwx------   1 dichter    680724 Sep  1  1999 a.out
-rw-------   1 dichter         0 Aug 31 14:04 done
-rw-------   1 dichter       187 Sep  1  1999 sayTest.cpp


Below, we compile only the other source code, sayTest.cpp. Similarly, this produces a file, sayTest.o. If the file had errors in it, we would have gotten a list of errors to be corrected. 


axon% g++ -c sayTest.cpp


Below, we compile and link the two modules. The lack of the switch -c, means it is not compile only. It is compile then link the modules into a single program. The -o switch followed by a name instructs the system to produce a working program under the name prog. Any other name might have been chosen.

axon% g++ -o prog Talker.cpp sayTest.cpp

Below, we run the compiled program, and the output is the same as the program we built in the VC++ environment. 

axon% prog
I Love C++
hmmmmmmmm
I love Java

axon%