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MUMPS Examples
MUMPS ("Massachusetts General Hospital Utility Multi-Programming System"), or M, is a general-purpose computer programming language originally designed in 1966 for the healthcare industry. Its differentiating feature is its "built-in" database, enabling high-level access to disk storage using simple symbolic program variables and subscripted arrays; similar to the variables used by most languages to access main memory. Read more...
The implementations currently available are:
The examples in this tutorial are run with both GPL Mumps and GT.M.
Prerequisites
GPL Mumps
- The Mumps Programming Language
- Mumps Language Users' Guide
- Mumps Language Quick Introduction & Tutorial
GT.M
Quick Setup
GPL Mumps
To install the open source distribution of the Mumps interpreter:
cd /usr/local/src
wget https://www.cs.uni.edu/~okane/source/MUMPS-MDH/mumps-18.02.src.tar.gz
tar -zxvf mumps-18.02.src.tar.gz
cd mumpsc
./ConfigureNative.script
./BuildMumpsWithGlobalsInSingleUserNative.script
The resulting interpreter is located in /usr/bin/mumps.
mumps
Mumps 17.30; Built: 16:05:53 Sep 23 2019
Float: double; DBMS: Native Stand Alone; Hardware math: yes; Int: int; Float digits: 6; Cache: 33; Block: 2048; FP Bits: N/A
http://threadsafebooks.com/
Enter HALT to exit
> write "Hello world"
Hello world
> halt
EOF - goodbye ...
To uninstall GPL Mumps:
cd /usr/local/src/mumpsc
make uninstall
rm -f /usr/bin/mumps*
GT.M
To install GT.M on Debian based OS:
apt-get install fis-gtm
Set up the environment variables:
source /usr/lib/x86_64-linux-gnu/fis-gtm/V6.3-003A_x86_64/gtmprofile
Open the GT.M prompt:
gtm
GTM>write "Hello world"
Hello world
GTM>halt
To uninstall GT.M:
apt-get purge fis-gtm
Run the Examples
GPL Mumps
Use the Open Mumps interpreter:
mumps HelloWorld.m
GT.M
Copy the examples into your ~/.fis-gtm/V6.3-003A_x86_64/r folder and run:
mumps -run ^HelloWorld
1. The Very Basics
HelloWorld.mps
Hello world
HelloWorldInLoop.mps
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
HelloWorldInAnotherLoop.mps
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
HelloWorldInNestedLoop.mps
1:1 Hello world
1:2 Hello world
1:3 Hello world
1:4 Hello world
1:5 Hello world
2:1 Hello world
2:2 Hello world
2:3 Hello world
2:4 Hello world
2:5 Hello world
ArithmeticOperations.mps
There were 7 apples, 8 pears and 9 oranges,
a total of 24 fruits in a basket.
Then, something happened:
1 apple, 2 pears and 0 oranges were eaten!
Now there are 21 fruits in the basket,
the average fruit value is 7.
Arrays.mps
Approaching the solar system:
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune
Pluto
September 2019:
26 27 28 29 30 31 1
2 3 4 5 6 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
30 1 2 3 4 5 6
Genealogical tree:
Harry and Emily had Jack
Associative array:
Have you ever been to London?
2. User Defined Functions
FactorialByReference.mps
Enter n: 5
5! = 120
Contributions
Would you help make this tutorial better? Contributions are welcome.
- Feel free to send a pull request
- Drop an email at info@programarivm.com with the subject "Open MUMPS by Example"
- Leave me a comment on Twitter
- Say hello on Google+
Many thanks.