Home Accessibility Courses Twitter The Mouth Facebook Resources Site Map About Us Contact
 
For 2021 - online Python 3 training - see ((here)).

Our plans were to retire in summer 2020 and see the world, but Coronavirus has lead us into a lot of lockdown programming in Python 3 and PHP 7.
We can now offer tailored online training - small groups, real tutors - works really well for groups of 4 to 14 delegates. Anywhere in the world; course language English.

Please ask about private 'maintenance' training for Python 2, Tcl, Perl, PHP, Lua, etc.
Multiple inheritance and constructor calls
[incr-Tcl] example from a Well House Consultants training course
More on [incr-Tcl] [link]
Source code: inherits.itcl Module: T245
#!/usr/bin/env tclsh

# Demonstration of multiple inheritance in Itcl

package require Itcl
namespace import itcl::*

# First base class

class person {
        public variable name
        public variable age
        constructor {{inname "A N Other"} {inage 21}} {
                set name $inname
                set age $inage
                }
        }

# Second base class

class cost {
        public variable startup
        public variable annual
        constructor {{yearly 12000} {newstart 0}} {
                set startup $newstart
                set annual $yearly
        }
        method getmonthly {} {
                return [expr $annual/12.]
                }
        }

# class that multiple inherits

class employee {
        inherit person cost
        variable empnumber
        constructor {empn} {
                # Construct a cost ...
                cost::constructor 15000 } {
                # automatically constructs a person
                # with all parameters defaulted. Then the extra
                # variables are set up here
                set empnumber $empn
                }
        }

# Test application to use employee class

# Constructor test

employee boris 77653
employee brenda 72727

# change various inherited settings!

boris configure -name "Boris Morris"
brenda configure -age 50
brenda configure -annual 18500

# Retreive and print various attributes

foreach teammember {boris brenda} {
        set name [$teammember cget -name]
        set paythem [$teammember getmonthly]
        puts "Pay $name at $paythem per month"
        }


Learn about this subject
This module and example are covered on the following public courses:
 * Learning to program in Tcl
 * Tcl Programming
 * Tcl Programming
Also available on on site courses for larger groups

Books covering this topic
Yes. We have over 700 books in our library. Books covering Tcl, Tk and Expect are listed here and when you've selected a relevant book we'll link you on to Amazon to order.

Other Examples
This example comes from our "[incr-Tcl]" training module. You'll find a description of the topic and some other closely related examples on the "[incr-Tcl]" module index page.

Full description of the source code
You can learn more about this example on the training courses listed on this page, on which you'll be given a full set of training notes.

Many other training modules are available for download (for limited use) from our download centre under an Open Training Notes License.

Other resources
• Our Solutions centre provides a number of longer technical articles.
• Our Opentalk forum archive provides a question and answer centre.
The Horse's mouth provides a daily tip or thought.
• Further resources are available via the resources centre.
• All of these resources can be searched through through our search engine
• And there's a global index here.

Web site author
This web site is written and maintained by Well House Consultants.

Purpose of this website
This is a sample program, class demonstration or answer from a training course. It's main purpose is to provide an after-course service to customers who have attended our public private or on site courses, but the examples are made generally available under conditions described below.

Conditions of use
Past attendees on our training courses are welcome to use individual examples in the course of their programming, but must check the examples they use to ensure that they are suitable for their job. Remember that some of our examples show you how not to do things - check in your notes. Well House Consultants take no responsibility for the suitability of these example programs to customer's needs.

This program is copyright Well House Consultants Ltd. You are forbidden from using it for running your own training courses without our prior written permission. See our page on courseware provision for more details.

Any of our images within this code may NOT be reused on a public URL without our prior permission. For Bona Fide personal use, we will often grant you permission provided that you provide a link back. Commercial use on a website will incur a license fee for each image used - details on request.

You can Add a comment or ranking to this page

© WELL HOUSE CONSULTANTS LTD., 2022: 48 Spa Road • Melksham, Wiltshire • United Kingdom • SN12 7NY
PH: 01144 1225 708225 • EMAIL: info@wellho.net • WEB: http://www.wellho.net • SKYPE: wellho

PAGE: http://www.wellho.net/resources/ex.php • PAGE BUILT: Sun Oct 11 14:50:09 2020 • BUILD SYSTEM: JelliaJamb