Some questions about "li

CNOOC

Could someone tell me if my answer are right.

[code:1]struct NodeType;
typedef NodeType* NodePtr;

struct NodeType
{
        int number;
        char character;
        NodePtr link;
};

NodePtr currPtr = NULL;
NodePtr firstPtr = NULL;
NodePtr lastPtr = NULL;

currPtr = new NodeType;
currPtr->number = 13;
currPtr->character = 'z';
currPtr->link = new NodeType;
lastPtr = currPtr->link;
lastPtr->number = 9;
firstPtr = new NodeType;
lastPtr->link = firstPtr;
firstPtr->number = 9;
firstPtr->character = 'h';
firstPtr->link = currPtr;
[/code:1]

a. firstPtr->link->number
b. firstPtr->link->link->character
c. firstPtr->link == lastPtr
d. currPtr->link->number
e. currPtr->link == *lastPtr
f. firstPtr == lastPtr->Link
g. firstPtr->number < firstPtr->link->number

my answers:

a. 13
b. undefined
c. False
d. 9
e. False
f. True
g. True

Dragonfly

other should be right.
but b is not undefined. it is an uninitialized char, so should be zero or any value.

CNOOC

howcome?

Dragonfly

[quote:ba78900564="CNOOC"]howcome?[/quote]

what u mean?

CNOOC

I mean why it should be zero or any numbers?

Dragonfly

u do not init the lastptr. so its value is uninitialized. for old c++ spec. a new object will init to a zero value. but latest spec will leave it uninitialized. so u had better init it before u use it.