new a typedefed struct

[Vincent SHAO]

There is a struct:

struct _point{
int x;
int y;
};
typedef _point Point;

struct _queue_node{
Point coordinate;
struct _queue_node* next;
};
typedef struct _queue_node Node;
typedef struct _queue_node* pNode;

Why i can't new a Node:
pNode n=new Node(); //error:no appropriate default constructor
available
i can only pNode n=new _queue_node();
Thank you

[Alf P. Steinbach]

* Vincent SHAO:

There is a struct:

struct _point{
int x;
int y;
};
typedef _point Point;

In C++ just write

struct Point { int x, y; };

struct _queue_node{
Point coordinate;
struct _queue_node* next;
};
typedef struct _queue_node Node;
typedef struct _queue_node* pNode;

In C++ just write

struct Node
{
Point coordinate;
Node* next;
};

Why i can't new a Node:
pNode n=new Node(); //error:no appropriate default constructor
available

Mysterious. Which compiler & version of that compiler are you using?
Academically it could be due to your use of names with leading underscores,
however, in practice I very much doubt that.
Cheers, & hth.,

- Alf

[Vincent SHAO]

On 4ÔÂ16ÈÕ, ÉÏÎç9ʱ49·Ö, "Alf P. Steinbach" <[e-mail]:

* Vincent SHAO:

There is a struct:

struct _point{
int x;
int y;
};
typedef _point Point;

In C++ just write

struct Point { int x, y; };

struct _queue_node{
Point coordinate;
struct _queue_node* next;
};
typedef struct _queue_node Node;
typedef struct _queue_node* pNode;

In C++ just write

struct Node
{
Point coordinate;
Node* next;
};

Why i can't new a Node:
pNode n=new Node(); //error:no appropriate default constructor
available

Mysterious. Which compiler & version of that compiler are you using?
Academically it could be due to your use of names with leading underscores,
however, in practice I very much doubt that.

Cheers, & hth.,

- Alf

Great thanks!