一、问题：合并两个有序单链表,合并后的单链表依然有序。
二、分析：
1.有如下两个有序链表str1和str2
2.合并后的新链表的头结点定义为newpHead，采用摘结点法：
三、代码实现（c语言）
sListNode* MergeList(sListNode* FirpHead, sListNode* SecpHead)
{
if(FirpHead == NULL)
{
return SecpHead;
}
if(SecpHead == NULL)
{
return FirpHead;
}
sListNode* newpHead = NULL;
sListNode* firCur = FirpHead, *secCur = SecpHead;
sListNode* tail = NULL;
if(firCur->data < secCur->data)
{
newpHead = firCur;
firCur = firCur->next;
}
else
{
newpHead = secCur;
secCur = secCur->next;
}
tail = newpHead;
while(firCur != NULL && secCur != NULL)
{
if(firCur->data < secCur->data)
{
tail->next = firCur;
firCur = firCur->next;
}
else
{
tail->next = secCur;
secCur = secCur->next;
}
tail = tail->next;
}
if(firCur == NULL)
{
tail->next = secCur;
}
if(secCur == NULL)
{
tail->next = firCur;
}
return newpHead;
