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copied!<p>For future reference on Stack Overflow, copy-and-paste any and all compiler errors verbatim, and point out the line numbers in your code snippets.</p> <hr> <p>If you're new to C++, I highly, highly recommend that you <a href="https://stackoverflow.com/tags/c%2b%2b/info">pick up a good introductory C++ book</a> and read it. The C++ tag wiki here has a list of books recommended by the C++ community here on Stack Overflow.</p> <hr> <p>There are multiple issues with the code snippet you posted. Here's what I can see from visual inspection of the snippet:</p> <p>Change <code>typedef const T</code> to <code>typename T</code> and move the definition into the header:</p> <pre><code>class Constants { public: [...] template<typename T> static CString ToString(T value); { std::stringstream ss; // Note std:: prefix! ss << value; CString csRow = ss.str().c_str(); return csRow; } }; </code></pre> <p>(You can also use <code>class T</code> instead of <code>typename T</code>; they are both equivalent in this case.)</p> <p>Ensure that the compiler can see the definition of <code>CString</code>. <a href="http://msdn.microsoft.com/en-us/library/5bzxfsea.aspx" rel="nofollow noreferrer">You may need to include <code>cstringt.h</code></a> if <code>stdafx.h</code> doesn't do that already.</p> <p>Also note that the standard library types live in the <code>std</code> namespace. That's why there's a <code>std::stringstream</code> there instead of simply a <code>stringstream</code>. You could also use <code>using namespace std;</code>, but do not ever use it in a header file.</p> <p>Avoid the use of <code>UPPERCASE NAMES</code> for variables and parameters; they are usually reserved for macros.</p>

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