Why static data member 'int' could initialize in class body? but 'double' can't?
eg:
class Example
{
public:
static double rate = 6.5; //wrong...
static int versize = 20; //right
}
double Example::rate = 6.5; //yesWhat reason by design that syntax ?
Jump to PostI'm suprised that your compiler doesn't also complain about the
intdeclaration.
It should be like this:class Example { public: static const int versize = 20; };To use static with doubles, you could try something like this:
class Example { public: …
Jump to PostWhy static data member 'int' could initialize in class body? but 'double' can't?
eg:class Example
{
public:
static double rate = 6.5; //wrong...
static int versize = 20; //right
}
double Example::rate = 6.5; //yes
What reason by design that syntax ?Don't forget the semicolon to end the …
I'm suprised that your compiler doesn't also complain about the int declaration.
It should be like this:
class Example
{
public:
static const int versize = 20;
};To use static with doubles, you could try something like this:
class Example
{
public:
static inline double something() { return 3.141592; }
};Why static data member 'int' could initialize in class body? but 'double' can't?
eg:class Example
{
public:
static double rate = 6.5; //wrong...
static int versize = 20; //right
}
double Example::rate = 6.5; //yes
What reason by design that syntax ?
Don't forget the semicolon to end the class.
static int versize = 20; // also wrongError message is as follows:
ISO C++ forbids in-class initialization of non-const static member `versize'
The C++ Standard (9.4.2,2) allows to specify constant-initializer for const integral or const enumeration static data members only. The type double is not an integral type.
WHY?
Thanks !
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