2016最新Java认证笔试题及答案
}
void main( void )
{
vectordata;
ifstreamin("c:\\data.txt");
if ( !in)
{
cout<<"file error!";
exit(1);
}
int temp;
while (!in.eof())
{
in>>temp;
data.push_back(temp);
}
in.close(); //关闭输入文件流
Order(data);
ofstream out("c:\\result.txt");
if ( !out)
{
cout<<"fileerror!";
exit(1);
}
for ( i = 0 ; i < data.size() ; i++)
out<<<" ?;< P>
10. 链表题：一个链表的结点结构
struct Node
{
int data ;
Node *next ;
};
typedef struct Node Node ;
(1)已知链表的头结点head,写一个函数把这个链表逆序 ( Intel)
Node * ReverseList(Node*head) //链表逆序
{
if ( head == NULL || head->next == NULL )
returnhead;
Node *p1 = head ;
Node *p2 = p1->next ;
Node *p3 =p2->next ;
p1->next = NULL ;
while ( p3 != NULL )
{
p2->next = p1 ;
p1 = p2 ;
p2 = p3 ;
p3 = p3->next ;
}
p2->next = p1 ;
head = p2 ;
return head ;
}
(2)已知两个链表head1 和head2 各自有序，请把它们合并成一个链表依然有序。(保留所有结点，即便大小相同)
Node *Merge(Node *head1 , Node *head2)
{
if ( head1 == NULL)
return head2;
if ( head2 == NULL)
return head1 ;
Node *head = NULL ;
Node*p1 = NULL;
Node *p2 = NULL;
if ( head1->data < head2->data )
{
head = head1 ;
p1 = head1->next;
p2 = head2 ;
}
else
{
head = head2 ;
p2 = head2->next ;
p1 = head1 ;
}
Node *pcurrent = head ;
while ( p1 != NULL && p2 != NULL)
{
if ( p1->data <= p2->data )
{
pcurrent->next = p1;
pcurrent = p1 ;
p1 = p1->next ;
}
else
{
pcurrent->next = p2 ;
pcurrent = p2 ;
p2 = p2->next ;
}
}
if ( p1 != NULL )
pcurrent->next = p1 ;
if ( p2 != NULL )
pcurrent->next = p2 ;
return head ;
}
(3)已知两个链表head1 和head2各自有序，请把它们合并成一个链表依然有序，这次要求用递归方法进行。 (Autodesk)
答案：
Node *MergeRecursive(Node *head1 , Node *head2)
{
if ( head1 == NULL )
return head2 ;
if ( head2 == NULL)
return head1 ;
Node *head =NULL ;
if ( head1->data < head2->data )
{
head = head1 ;
head->next = MergeRecursive(head1->next,head2);
}
else
{
head = head2 ;
head->next = MergeRecursive(head1,head2->next);
}
return head ;
}
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