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POPassing a generic pointer to a method in c#
 

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  1. POPassing a generic pointer to a method in c#
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    <p>I have created a generic type to act as a pointer so that I can pass by reference. (Perhaps there is a much more simple way of doing this but I want to stress that I am doing this to learn more about generics and passing by reference, not the most efficient way of completing the task, if that makes sense.)</p> <p>Here is the code I wrote for the generic type</p> <pre><code>class GenericPointer&lt;T&gt; { public T item; public void setItem(T i){ item = i; } public T getItem(){ return item; } } </code></pre> <p>In my program I have created an instance of this type called 'intPointer'. The value 143 is arbitrary.</p> <pre><code>GenericPointer&lt;int&gt; intPointer = new GenericPointer&lt;int&gt;(); intPointer.setItem(143); Console.WriteLine(intPointer.getItem()); </code></pre> <p>The above code runs properly, setting and returning the value 143.</p> <p>I now want to pass this 'intPointer' to a method that increments it and then prints the value again.</p> <p>So I wrote a method called addone()</p> <pre><code>public void addone(int i) { i ++; } </code></pre> <p>Now I want to make the following calls (remembering that I already set the value to 143):</p> <pre><code>Console.WriteLine(intPointer.getItem()); addone(intPointer); Console.WriteLine(intPointer.getItem()); </code></pre> <p>What I was expecting to see was 143 then 144 however I get the following errors:</p> <pre><code>The best overloaded method match for 'Notes.Program.addone(int)' has some invalid arguments </code></pre> <p>and:</p> <pre><code>cannot convert from 'Notes.GenericPointer&lt;int&gt;' to 'int' </code></pre> <p>Any help would be greatly appreciated!</p>
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    1. USNathaniel Ford
    1. USAndrew
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    1. COThis question is too broad...a proper answer would require a complete explanation of a good chunk of C#...
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      1. USMiMo
    2. COWhy not simply use the ref keyword for this? http://msdn.microsoft.com/en-us/library/14akc2c7.aspx And also quite a good answer here: http://stackoverflow.com/a/3539299/578843 .
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    3. CO@MiMo I think i have give a pretty specific explanation of my issue here. This site is here for the purpose of learning and solving problems. No one is forcing you to read or be condescending. I don't need someone to hold my hand, just a push in the right direction. Fortunately there are others willing to help. If you don't have anything productive to say then do everyone else a favor and keep your comments to yourself.
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      1. USAndrew
 

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