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习题11-8 单链表结点删除

读取链表

struct ListNode *readlist(){struct ListNode *head,*tail,*t;head=tail=NULL;int x;scanf("%d",&x);while(x != -1){t=(struct ListNode *)malloc(sizeof(struct ListNode));t->data=x;t->next=NULL;if(head == NULL){head=t;}else{tail->next=t;}tail=t;scanf("%d",&x);}return head;
}

删除值为m的节点

struct ListNode *deletem( struct ListNode *L, int m ){struct ListNode *cur,*pre,*t;while(L->data == m){L=L->next;if(L == NULL){return L;}}pre=L;cur=L->next;while(cur != NULL){if(cur -> data == m){pre->next=cur->next;cur=pre->next;}else{pre=cur;cur=cur->next;}}return L;
}