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POResolving "only static const integral data members can be initialized within a class" compilation error
 

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  1. POResolving "only static const integral data members can be initialized within a class" compilation error
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    <p>The following for creating a Global Object is resulting in compilation errors.</p> <pre><code>#include "stdafx.h" #include &lt;iostream&gt; using namespace System; using namespace std; #pragma hdrstop class Tester; void input(); class Tester { static int number = 5; public: Tester(){}; ~Tester(){}; void setNumber(int newNumber) { number = newNumber; } int getNumber() { return number; } } Tester testerObject; void main(void) { cout &lt;&lt; "Welcome!" &lt;&lt; endl; while(1) { input(); } } void input() { int newNumber = 0; cout &lt;&lt; "The current number is " &lt;&lt; testerObject.getNumber(); cout &lt;&lt; "Change number to: "; cin &gt;&gt; newNumber; cout &lt;&lt; endl; testerObject.setNumber(newNumber); cout &lt;&lt; "The number has been changed to " &lt;&lt; testerObject.getNumber() &lt;&lt; endl; } </code></pre> <p>Here are the compile errors:</p> <pre><code>1&gt;------ Build started: Project: test, Configuration: Debug Win32 ------ 1&gt;Compiling... 1&gt;test.cpp 1&gt;.\test.cpp(15) : error C2864: 'Tester::number' : only static const integral data members can be initialized within a class 1&gt;.\test.cpp(33) : error C2146: syntax error : missing ';' before identifier 'testerObject' 1&gt;.\test.cpp(33) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int 1&gt;.\test.cpp(49) : error C2039: 'getNumber' : is not a member of 'System::Int32' 1&gt; c:\windows\microsoft.net\framework\v2.0.50727\mscorlib.dll : see declaration of 'System::Int32' 1&gt;.\test.cpp(55) : error C2039: 'setNumber' : is not a member of 'System::Int32' 1&gt; c:\windows\microsoft.net\framework\v2.0.50727\mscorlib.dll : see declaration of 'System::Int32' 1&gt;.\test.cpp(57) : error C2039: 'getNumber' : is not a member of 'System::Int32' 1&gt; c:\windows\microsoft.net\framework\v2.0.50727\mscorlib.dll : see declaration of 'System::Int32' 1&gt;Build log was saved at "file://c:\Users\Owner\Documents\Visual Studio 2008\Projects\test\test\Debug\BuildLog.htm" 1&gt;test - 6 error(s), 0 warning(s) ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== </code></pre> <ol> <li>How do I create a Global Class Object correctly like I've attempted here.</li> <li>And how do I fix that "only static const integral data members can be initialized within a class"</li> <li>And basically how do I fix the rest of the errors so I can get this to compile?</li> </ol> <p>I like declaring Global Class Objects at file scope (I like declaring all globals at file scope) because when I have to create separate source files and do "extern" and everything it becomes extremely complicated and never works for me. Although, I do want to figure out how to do that eventually... it seems every tutorial I look at won't compile though and unless it compiles I have no idea how to recreate it!</p> <p>If I can just get this to compile...then I can successfully learn how to do this. So if someone could rewrite the above to where it literally copies &amp; pastes into Visual C++ Express 2008 and works I will finally be able to figure out how to recreate it. I'm extremely excited on seeing the fix for this! It is just I can't get Global Objects to work right! Any other information on declaring Global Class Objects...or anything for that matter is welcome!</p>
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    1. COYou are aware that your code is being compiled as C++/CLI, right? That is, the .NET variant of C++. Unless that is specifically what you want, you should probably disable it. Create a Win32 Project instead.
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    2. COpossible duplicate of [Why can't I have a non-integral static const member in a class?](http://stackoverflow.com/questions/370283/why-cant-i-have-a-non-integral-static-const-member-in-a-class)
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