Path: utzoo!attcan!uunet!mcsun!ukc!edcastle!ecsv38
From: ecsv38@castle.ed.ac.uk (S Manoharan)
Newsgroups: comp.lang.c++
Subject: `new'ing an object that has a constructor
Message-ID: <5137@castle.ed.ac.uk>
Date: 12 Jul 90 12:00:33 GMT
Reply-To: ecsv38@castle.ed.ac.uk (S Manoharan)
Organization: Dept of Computer Science, University of Edinburgh
Lines: 37

Well, the subject line says it all. How do I `new' an object
that's got a constructor? I am interested in `new'ing an array
of such objects.

Consider the following code:

class A {
private:
   int sz;
public:
   A(int n)     { sz = n; }
   void foo()   { cout << form("%d\n", sz); }
};

int main()
{
   A *p1 = new A(3);
   A *p2 = new A[10]; // <--------- Problem's here.

   p1->foo();
   return 0;
}

I am using g++ 1.37.1. It complains "too few arguments for 
constructor `A'". Fine. Now if I change the line to:
   A *p2 = new A(3)[10]; // <--------- Problem's here.
I get a complaint "parse error before `['".

Where do I go wrong? Or, how do I get around this?

Lotsa thanks in advance.

Manoharan.

Ps - I tried it with cfront 1.2.1 [Sorry, that's all we've got
here] and it gives a compile time Memory fault in both cases. 
[ 701 Memory fault in the 1st case and 695 Mem Fault in the 2nd ]