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From: chien@iitmax.iit.edu (Greg Chien)
Newsgroups: comp.lang.c++
Subject: HELP: default constructor for array of class
Keywords: constructor, default, class, array, definition
Message-ID: <1991May2.165955.28385@iitmax.iit.edu>
Date: 2 May 91 16:59:55 GMT
Organization: Illinois Institute of Technology / Academic Computing Center
Lines: 36


A beginner's question to C++ gurus:

When compiling the following program, C++ complains that Point::Point()
default constructor is not found in resolving Point p[2].  However,
if Point() { x = 200; } is uncommented, ambiguous constructors error
is generated in resolving Point q.  Both cases are tried with HP/C++ 2.1
and Borland C++.  What should be the right way to do?  Thanks in advance.

Greg Chien
Design Processes Laboratory
Institute of Design
Illinois Institute of Technology
chien@iitmax.iit.edu

// ---------------- 8< -------- CUT HERE ---------- 8< -----------------
#include <iostream.h>

class Point {
	int x;
public:
//	Point() { x = 200; }
	Point(int xc = 100) { x = xc; }
	GetX() { return x;}
};

int main()
{
	Point p[2];
	Point q;

	cout << p[1].GetX() << "\n";
	cout << q.GetX() << "\nO.K.\n";
	return 0;
}
// ---------------- 8< -------- CUT HERE ---------- 8< -----------------