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Answer» Hi,
when I compile the code below, I get the following ERROR messages:
[linker error] undefined REFERENCE to `sample_class::UsingFile'
ld returned 1 exit status
[Build Error] ["Class] Error 1
How do I solve this problem? Thanks.
Code: [Select]class sample_class
{
PUBLIC:
sample_class()
{
UsingFile = 0;
}
~sample_class()
{
--UsingFile;
}
static bool IsFileInUse();
private:
static int UsingFile;
};
bool sample_class::IsFileInUse()
{
if(UsingFile != 0)
{
cout << "File in use" << endl << endl;
return (true);
}
}
int main(int argc, char *argv[])
{
SYSTEM("PAUSE");
return EXIT_SUCCESS;
}
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