为什么在while循环中不打印current->val的值，

 while(i<=count-B-1)
    {
        cout<<i<<endl;
        current=current->next;
        cout<<current->val<<endl;
        i++;
    }

完整代码如下：

/**
 * Definition for singly-linked list.
 * struct ListNode {
 *     int val;
 *     ListNode *next;
 *     ListNode(int x) : val(x),next(NULL) {}
 * };
 */
ListNode* Solution::removeNthFromEnd(ListNode* A,int B) {
    int count=0;
    ListNode *current=A;
    while(current!=NULL)
    {
        count++;
        current=current->next;
    }
    if(B>count)
    {
        return A->next;
    }
    if(A->next=NULL)
    {
        return A->next;
    }
    current = A;
    int i=0;
    while(i<=count-B-1)
    {
        cout<<i<<endl;
        current=current->next;
        cout<<current->val<<endl;
        i++;
    }
    // cout<<current->val<<endl;
    current->next=current->next->next;
    return A;
    
}