const in template argument [duplicate]

Answer 1

const is not required in your case

for instance, both classes Matrix_A and Matrix_B below are the same for the compiler point of view. const here is just to enforce the fact that ROWNUM and COLNUM are constant for humans point of view, but not required.

template  
class Matrix_A 
{
};

template  
class Matrix_B
{
};

Moreover following class Matrix_C also specify similar constant variables ROWNUM and COLNUM in another way:

template  
class Matrix_C
{
   static int const ROWNUM = 5;
   static int const COLNUM = 20;
};

// the following three objects use constant variables ROWNUM and COLNUM
Matrix_A a;
Matrix_B b;
Matrix_C      c;