initializing a const array in a class

[J. Campbell]

I have a class that I want to contain a const data-member equivalent to eg:

int array[8] = {7,11,13,17,19,23,29,31};

What's the simplest way to create such a table inside a class?

Thanks,

Joe

 

[Gianni Mariani]

I have a class that I want to contain a const data-member equivalent to eg:

int array[8] = {7,11,13,17,19,23,29,31};

What's the simplest way to create such a table inside a class?

Thanks,

Joe

How about this ?

const int array[8] = {7,11,13,17,19,23,29,31};

struct foo
{
const int (&m_array)[8];
foo()
: m_array( array )
{
}
};

 

[Joe C]

I have a class that I want to contain a const data-member equivalent to eg:

int array[8] = {7,11,13,17,19,23,29,31};

What's the simplest way to create such a table inside a class?

Thanks,

Joe

How about this ?

const int array[8] = {7,11,13,17,19,23,29,31};

struct foo
{
const int (&m_array)[8];
foo()
: m_array( array )
{
}
};

Gianni, Thanks. This works;-) I'm a little confused by the syntax. What
exactly does:
const int (&m_array)[8]
mean? and how does it differ from a:
const int* to the head of an array?

Thanks for your help/solution.

Joe

 

[S. Richards]

I have a class that I want to contain a const data-member equivalent to eg:

int array[8] = {7,11,13,17,19,23,29,31};

What's the simplest way to create such a table inside a class?

Thanks,

Joe

You can make it static and initialize it as follows:

class A
{
public:
static const int iarr[2];
};

const int A::iarr[2] = { 0, 1 };

Sheldon.

 

[Gianni Mariani]

I have a class that I want to contain a const data-member equivalent to

eg:

int array[8] = {7,11,13,17,19,23,29,31};

What's the simplest way to create such a table inside a class?

Thanks,

Joe

How about this ?

const int array[8] = {7,11,13,17,19,23,29,31};

struct foo
{
const int (&m_array)[8];
foo()
: m_array( array )
{
}
};

Gianni, Thanks. This works;-) I'm a little confused by the syntax. What
exactly does:
const int (&m_array)[8]
mean?

it says: m_array is a reference to an 8 element array of const int.

and how does it differ from a:

const int* to the head of an array?

Little except that in the case of the array reference, the compiler
"knows" the size of the array - if there was code that depended on the
"array" instead of "pointer" behaviour, you preserved it's meaning using
the reference. You can also use this information to eliminate some
overrun errors.