'Should I use a constructor when size is known

Is there any different between these two implementation

//SIZE is known before runtime
class A{
   int* p1 = new int[SIZE];
}
class B{
   int* p1;
   B(){//Using constructor
   p1 = new int[SIZE];
   }
}
c++performancedynamic


Solution 1:[1]

There is no practical difference between these two examples.

P.S. Avoid owning bare pointers. Simplest solution for safe use of dynamic arrays is std::vector.

P.P.S. Prefer using member initialisers (either a default member initialiser such as in the second example, or in the member initialisation list) to assigning uninitialised members when possible.

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Source: Stack Overflow

Solution Source
Solution 1

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