function stringLength = storage(stringInput)
is your constructor. It must return the constructed object.
In the simple case of a non-derived class, the object just pops into existence in the variable named on the left side of the = of the constructor method. In this case, that means that inside the storage method, the variable stringLength will hold the constructed object of class storage . You can then potentially modify that variable stringLength but when you do so you must do so in a way that the class storage is preserved.
It looks to me as if you are trying to create a constructor that stores the input character vector and immediately return... twice its length? (Perhaps representing number of bytes of storage ?) You cannot do that in one shot: you need to return the object and then you take the strlength of the stored object as a separate operation. You will want to use a different method for that, perhaps named stringLength
classdef storage
properties
stringInput
end
methods
function obj = storage(stringInput)
obj.stringInput = stringInput;
end
function len = stringLength(obj)
len = strlength(obj.stringInput)*2;
end
end
end
test with
obj = storage('Hello world!')
obj.stringLength
