initializing a constant in the .h file?

[anonymous]

hello,
i am attempting to initialize a constant in my .h file. it would be terrific if i
could also assign the constant, but i continue to get compile problems. this
is what i'm trying to do:

(in myfile.h)
const std::string MY_CONSTANT = "permanent value";

but my compiler (gcc version 3.2.1) tells me:

ISO C++ forbids initialization of member

any feedback is appreciated

 

[John Harrison]

hello,
i am attempting to initialize a constant in my .h file. it would be
terrific if i
could also assign the constant, but i continue to get compile problems.
this
is what i'm trying to do:

(in myfile.h)
const std::string MY_CONSTANT = "permanent value";

but my compiler (gcc version 3.2.1) tells me:

ISO C++ forbids initialization of member

any feedback is appreciated

Well C++ does indeed forbid in-class initialisation of constants, except
for integral constants.

So you have to initialise your constant outside the class, in a source
file, instead. Is there any reason why this is a problem?

john

 

[John Harrison]

Well C++ does indeed forbid in-class initialisation of constants, except
for integral constants.

So you have to initialise your constant outside the class, in a source
file, instead. Is there any reason why this is a problem?

john

I missed that you haven't declared your constant as static, is there any
reason for this?

Normally you would do something like this

// in header file
class MyClass
{
static std::string MY_CONSTANT;
};

// in source file
std::string MyClass::MY_CONSTANT = "permanent value";

john

 

[=?ISO-8859-2?Q?Mateusz_=A3oskot?=]

(in myfile.h)
const std::string MY_CONSTANT = "permanent value";

I believe it will help:

http://tinyurl.com/4oanj

Greets