Programming On Redbrick - Revision history

Beimear at 10:34, 5 November 2012

2012-11-05T10:34:59Z

← Older revision		Revision as of 10:34, 5 November 2012
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	==Programming Environments==		==Programming Environments==

	~~Carbon~~ is the recommended programming environment on RedBrick, it has a large amount of programming tools available, and also has fast local disk space (available on request by mailing admins@redbrick).		Pygmalion is the recommended programming environment on RedBrick, it has a large amount of programming tools available, and also has fast local disk space (available on request by mailing admins@redbrick).

	To connect to ~~carbon~~ type:		To connect to pygmalion type:

	ssh username@~~carbon~~.redbrick.dcu.ie		ssh username@pygmalion.redbrick.dcu.ie

	on linux, or on windows with putty set your hostname to ~~carbon~~.redbrick.dcu.ie and click open.		on linux, or on windows with putty set your hostname to pygmalion.redbrick.dcu.ie and click open.

	==GCC==		==GCC==

Receive at 11:14, 5 March 2009

2009-03-05T11:14:06Z

← Older revision		Revision as of 11:14, 5 March 2009
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	Note: there is now a new [[Helpdesk]] C++ tutorial being constructed at the moment here at [[Cplusplus]].		Note: there is now a new [[Helpdesk]] C++ tutorial being constructed at the moment here at [[Cplusplus]].

			==Programming Environments==

			Carbon is the recommended programming environment on RedBrick, it has a large amount of programming tools available, and also has fast local disk space (available on request by mailing admins@redbrick).

			To connect to carbon type:

			ssh username@carbon.redbrick.dcu.ie

			on linux, or on windows with putty set your hostname to carbon.redbrick.dcu.ie and click open.

	==GCC==		==GCC==

Receive: /* got rid of the deathray line - java is on minerva */

2008-01-31T22:54:19Z

got rid of the deathray line - java is on minerva

← Older revision		Revision as of 22:54, 31 January 2008
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	==Compiling and Running Java Programs==		==Compiling and Running Java Programs==

	~~In order to use Java, first login to Deathray, like so:~~

	~~ssh deathray~~

	~~If you are prompted for a password, this is your normal RedBrick password.~~

	The Java compiler on redbrick is called, unsurprisingly, javac. Compiling Java programs is a little more complex than compiling C programs as you need to have two environment variables set, JAVA_HOME and CLASSPATH. To see what these are set to, at the prompt type :		The Java compiler on redbrick is called, unsurprisingly, javac. Compiling Java programs is a little more complex than compiling C programs as you need to have two environment variables set, JAVA_HOME and CLASSPATH. To see what these are set to, at the prompt type :

Coconut: /* Compiling and Running Java Programs */

2007-12-14T19:03:04Z

Compiling and Running Java Programs

← Older revision		Revision as of 19:03, 14 December 2007
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	ssh deathray		ssh deathray

			If you are prompted for a password, this is your normal RedBrick password.

	The Java compiler on redbrick is called, unsurprisingly, javac. Compiling Java programs is a little more complex than compiling C programs as you need to have two environment variables set, JAVA_HOME and CLASSPATH. To see what these are set to, at the prompt type :		The Java compiler on redbrick is called, unsurprisingly, javac. Compiling Java programs is a little more complex than compiling C programs as you need to have two environment variables set, JAVA_HOME and CLASSPATH. To see what these are set to, at the prompt type :

Coconut at 23:14, 5 December 2007

2007-12-05T23:14:02Z

← Older revision		Revision as of 23:14, 5 December 2007
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	This is a general introduction to compiling and running Java, C and C++ programs on redbrick. It is assumed that you already know how to write programs in any of these languages.		This is a general introduction to compiling and running Java, C and C++ programs on redbrick. It is assumed that you already know how to write programs in any of these languages.

	Note: there is now a new C++ tutorial being constructed at the moment here: [[Cplusplus]].		Note: there is now a new [[Helpdesk]] C++ tutorial being constructed at the moment here at [[Cplusplus]].

	==GCC==		==GCC==

Coconut at 19:32, 5 December 2007

2007-12-05T19:32:59Z

← Older revision		Revision as of 19:32, 5 December 2007
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	This is a general introduction to compiling and running Java, C and C++ programs on redbrick. It is assumed that you already know how to write programs in any of these languages.		This is a general introduction to compiling and running Java, C and C++ programs on redbrick. It is assumed that you already know how to write programs in any of these languages.

	Note: there is now a new [[C++ tutorial~~\|Cplusplus]]~~ being constructed at the moment.		Note: there is now a new C++ tutorial being constructed at the moment here: [[Cplusplus]].

	==GCC==		==GCC==

Coconut at 19:32, 5 December 2007

2007-12-05T19:32:34Z

← Older revision		Revision as of 19:32, 5 December 2007
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	This is a general introduction to compiling and running Java, C and C++ programs on redbrick. It is assumed that you already know how to write programs in any of these languages.		This is a general introduction to compiling and running Java, C and C++ programs on redbrick. It is assumed that you already know how to write programs in any of these languages.

			Note: there is now a new [[C++ tutorial\|Cplusplus]] being constructed at the moment.

	==GCC==		==GCC==

Coconut: /* GCC */

2007-11-21T00:19:44Z

GCC

← Older revision		Revision as of 00:19, 21 November 2007
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	./program		./program

			To compile C++ programs, use :

			g++ -o program prog.cpp

	==Compiling and Running Java Programs==		==Compiling and Running Java Programs==

Receive: category

2007-10-21T04:04:48Z

Receive: moved from old website

2007-10-21T03:19:13Z

moved from old website

New page

This is a general introduction to compiling and running Java, C and C++ programs on redbrick. It is assumed that you already know how to write programs in any of these languages.

==GCC==

GCC stands for Gnu C Compiler. It is a fairly popular UNIX C compiler and is based on the standard C Compiler, known as CC :o)

Once you have written a program in nano or vim and saved it as a .c file (the c suffix indicates it is a c language file), you can compile it to create a program that you can run on redbrick. Here is an example in which I compile a file I saved as prog.c into a program called program :

gcc -o program prog.c

If you want to ensure that the code you compile is ANSI compatible (that is that it fits the latest international standards for the way C code should be written), you can add the -ansi switch to the gcc command, so now you have :

gcc -ansi -o program prog.c

A lot of the time you will want to tidy up your code so that there aren't any warnings even when you compile it, to turn on warnings so you can see any possible errors in your code, add the -Wall switch to your gcc command, so now my example reads :

gcc -ansi -Wall -o program prog.c

Now that I have my program compiled and there were no errors, an ls on the directory I'm in will show up a file called program. To execute this program I type :

./program

==Compiling and Running Java Programs==

In order to use Java, first login to Deathray, like so:

ssh deathray

The Java compiler on redbrick is called, unsurprisingly, javac. Compiling Java programs is a little more complex than compiling C programs as you need to have two environment variables set, JAVA_HOME and CLASSPATH. To see what these are set to, at the prompt type :

echo $JAVA_HOME
echo $CLASSPATH

Echo is a command for printing stuff to the screen, what it does in the above example is "echo" the value of the JAVA_HOME and CLASSATH variables to the screen.

Your JAVA_HOME variable should be set to /usr/java and your CLASSPATH should be /usr/java/lib/dt.jar, if they're anything else you can edit the variables by typing the following :

JAVA_HOME=/usr/java
CLASSPATH=/usr/java/lib/dt.jar

Of course you can add extra directories to this, seperated by a : so that you can compile programs in your home directory. Another difference between javac and gcc is that the main class in your java program has to have the same name as the file it's in, and the file has to have a .java extension, for example :

javac progam.java

Then to execute the program (assuming it compiled okay ;o)) you type :

java program

This will execute the program.

← Older revision		Revision as of 04:04, 21 October 2007
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	This will execute the program.		This will execute the program.

			[[Category:Helpdesk]]