Re: Class containing an array as a member whose size can be specified at the compile time.
In article <1146109931.127711.92370@t31g2000cwb.googlegroups.com>,
"Shivani" <sg_01_in@yahoo.com> wrote:
Hi,
I want to declare a class which has an array as one of it's member
variable. How I can specify the size of the array at the compile time.
That is, i want to have first object obj1 with array size let's say as
10, second object obj2 with array of 20, third object obj3 with array
of 25. Can anyone tell me how I can achieve this.
Add it as a template parameter, as in:
template<unsigned N>
class MyClass
{
int array[N];
//...
};
Note: Each instantiation with a different value of N produces a
different type. For example: MyClass<2> is a distinct type from
MyClass<3>.
If they need to be the same type (say, if you want to store them in a
container), you'll have to use a solution with dynamic memory
allocation, as in:
class AnotherClass
{
std::vector<char> array;
//...
public:
explicit AnotherClass(unsigned N) : array(N) { /* ... */ }
//...
};
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