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The following 3 code blocks are the main.cpp, static_class_array.cpp, and static_class_array.h respectively. I'm getting the following error:

static_class_array.cpp||In constructor 'static_array_class::static_array_class()':| static_class_array.cpp|5|error: cannot convert '<brace-enclosed initializer list>' to 'int' in assignment| ||=== Build finished: 1 errors, 0 warnings ===| 


#include "static_class_array.h" int main() { static_array_class* array_class; array_class = new static_array_class(); delete array_class; return 0; } #include "static_class_array.h" static_array_class::static_array_class() { static_array_class::array[3] = {0,1,2}; } static_array_class::~static_array_class(){} #ifndef STATIC_CLASS_ARRAY_H #define STATIC_CLASS_ARRAY_H class static_array_class { private: static int array[3]; public: static_array_class(); ~static_array_class(); }; #endif
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2 Answers 2

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2

I think that what you want in the implementation file is:

 static_array_class::static_array_class() { } static_array_class::~static_array_class(){} int static_array_class::array[3] = {0,1,2};

Explanation of error message

"cannot convert 'brace-enclosed initializer list' to 'int' in assignment"

in submitted code.

This is because the code:

static_array_class::array[3] = {0,1,2};

is interpreted as meaning that {0,1,2} should be assigned to element 3 in the array. Element 3 is of type int, (and incidentally not allocated being the fourth element), so this is like:

int i = 0; i = {0,1,2};

Hence the error message.

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1 Comment

told me I had a conflicting declaration.
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They are not the same type;

Your class is a class which includes a an array -- they other is just an array.

With a static definition of a class member you need to declare the actual instance outside the class, just like with any other static, 

int static_array_class::array[3] = {0,1,2}; // note this line is outside the constructor static_array_class::static_array_class() { } static_array_class::~static_array_class(){}
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4 Comments

Sure is possible with coding -- you just need a bit more -- static members of a class are initialized not in the constrictor but outside the class, since they are not actually part-taking in the constrction/deconstrction -- just can almost consider them just a part of the name space rather than the class.
Also see this Q&A: stackoverflow.com/questions/185844/…
I tried that and then it tells me \static_class_array\static_class_array.cpp|6|undefined reference to `static_array_class::array'|
Updated the answer, you need to move the initialization outside the constructor and declare the actual static member instance

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