This is meant to be an introduction to C# and Mono. First, we need to download the mono runtime and compiler:
sudo apt-get install monodevelop mono-devel
For the purpose of this post, we are just going to create a simple program which prints out the text “Hello World”. Go ahead and make a directory for our project so we don’t make our home directory entirely too messy. I just make a directory called ‘mono’ under /home/sharms/mono for the duration of this post.
Go ahead and create a file called ‘helloWorld.cs’, and paste the following:
// Declare which namespace we want to use.
// This allows us to use Console.WriteLine
// instead of System.Console.WriteLine
// Basically like a python 'import' statement, or a
// php 'include' statement
using System;
// We create a class to contain it
class HelloWorld
{
// Must have a main function as this is what is
// first called when executing this
static void Main()
{
// C# requires ; after statements
// Actually output "Hello World"
Console.WriteLine("Hello World");
}
}
To compile it, run:
gmcs helloWorld.cs
This will generate a file called ‘helloWorld.exe’. To run it, type:
mono helloWorld.exe Hello World
And there you have it. I also stumbled on a Makefile tutorial today, so we can make a simple make file (I won’t describe all of this, just look at how it’s used). The tutorial is at: http://www.wlug.org.nz/MakefileHowto
[sharms@sparrow mono]$ cat Makefile COMPILER=gmcs all: helloWorld.exe helloWorld.exe: helloWorld.cs $(COMPILER) helloWorld.cs clean: rm -f helloWorld.exe .PHONY: all clean [sharms@sparrow mono]$ make gmcs helloWorld.cs [sharms@sparrow mono]$ make clean rm -f helloWorld.exe