Write a function that creates a GUI to calculate the area of a rectangle. It should have edit text boxes for the length and width, and a push button that causes the area to be calculated and printed in a static text box

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Ch13Ex16.m

function Ch13Ex16

% GUI to calculate the area of a rectangle

% Format of call: Ch13Ex16

% Does not return any values

% Create the GUI but make it invisible for now while 

% it is being initialized

f = figure('Visible', 'off','color','white','Position',...

 [300, 400, 500, 325]);

hlengthtext = uicontrol('Style','text','Position', ...

 [190, 250, 50, 18],'String','Length:','HorizontalAlignment',...

 'right','BackgroundColor','white');

hlengthedit = uicontrol('Style','edit','Position', ...

 [250, 250, 50, 25]);

hwidthtext = uicontrol('Style','text','Position', ...

 [190, 200, 50, 18],'String','Width:','HorizontalAlignment',...

 'right','BackgroundColor','white');

hwidthedit = uicontrol('Style','edit','Position', ...

 [250, 200, 50, 25]);

hbutton = uicontrol('Style','pushbutton','Position',...

 [200, 150, 100, 25],'String','Calculate Area',...

 'Callback',@calcarea);

hareatext = uicontrol('Style','text','Position', ...

 [190, 100, 50, 18],'String','Area:','HorizontalAlignment',...

 'right','BackgroundColor','white');

hareaedit = uicontrol('Style','text','Position', ...

 [250, 100, 50, 18],'HorizontalAlignment',...

 'right','BackgroundColor','white');

% Put a name on it and move to the center of the screen

set(f,'Name','Rectangle Area Calculator')

movegui(f,'center')

% Now the GUI is made visible

set(f,'Visible','on');

 %Callback function for editable text field

 function calcarea(source,eventdata)

 len = str2num(get(hlengthedit,'String'));

 width = str2num(get(hwidthedit,'String'));

 area = len*width;

 set(hareaedit,'String',num2str(area))

 end

end

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