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POUsing objects and object functions through variables
 

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  1. POUsing objects and object functions through variables
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    <p>Background of the program: the user is able to input a <code>string</code> of two words only - a verb and a noun. I tokenize this string into a <code>vector</code> and compare <code>tokens[0]</code> with a <code>vector</code> of allowed verbs, and <code>tokens[1]</code> with a <code>vector</code> of allowed nouns.</p> <p>Now, I'm trying to find a way to allow only certain verbs to be performed on certain nouns. For example, writing "take book" will give a message (or whatever) saying it's allowed, but writing "take door" would not be. I have so far created a <code>class</code> Object with <code>bool</code> values for each possible verb (eg. within the <code>class Object</code>, I can create an <code>Object book</code> for which <code>m_take = true</code>, or <code>false</code> for an <code>Object door</code>). </p> <p>However, I'm having trouble associating these objects with the user input. For example, I would like to be able to do something like this: <br> 1) User inputs "verb noun", which go into the tokens vector as <code>tokens[0]</code> and <code>tokens[1]</code>.<br> 2) Program checks if the input contains acceptable words (individually).<br> 3) Considering <code>getstat()</code> to be the function to retreive the bool value of the possible action doable on an object, the program retrieves <code>tokens[1].getstat(tokens[0])</code> and, if <code>true</code>, executes <code>tokens[0].tokens[1]()</code> (eg. <code>book.take()</code>). This way I could have only one <code>if</code> cycle in my <code>main()</code>, which can be used by all legal verbs and nouns, without making an infinite list of <code>if</code>, <code>else if</code>, etc, considering every single option manually. <br></p> <p>Sorry if this is at all confusing. I know it is not possible to use a variable as an object name, but I'm sure there's a better way to do this than doing cycles within cycles of considering every single mix and match of verb and noun. I'm experimenting with like 3 each at the moment, but once I get this working I plan on expanding it and it would be a nightmare to keep track of every change if I have to hard-code every possible verb and noun multiple times within the source code. (Also, sorry for not posting the whole source - it's a really long file just now!) Thanks for any help/hint in the right direction! </p>
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    1. COYou may want to read up on the concept of **pointer to member** (maybe also on virtual functions).
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