解释代码 scanf(" %c",&(q->data))

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请用c语言帮我修改以下代码void OnCustomerArrive(void *para) { printf("请输入窗口类型(A==个人现金业务,B==个人其他业务,C==对公现金业务,D==对公其他业务)："); char v; scanf(" %c", &v); // 加一个空格，避免读入上一次的回车 getchar(); // 把读入的回车从缓冲区去掉 if (v < 'A' || v > 'D') { printf("输入错误"); return; } WList p = Wlist; WList min = NULL; int start = 1; while (p != NULL) { if (!p->data.status && p->data.type == (v - 'A') && p->data.queue.length != MAX_QUEUE_NUM) { if (start) { min = p; start = 0; } if (min->data.queue.length > p->data.queue.length) { min = p; } } p = p->next; } if (min == NULL) { printf("业务还未添加"); return; } int customer = EnQueue(&min->data.queue); SqQueue q = min->data.queue; printf("请您到窗口编号 %d 区域等待，您的取号为%c%d-%02d，您前面有 %d 人正在排队", min->data.windowId, v, min->data.windowId, q.base[customer], q.length-1); }

void OnCustomerArrive(void *para) {
printf("请输入窗口类型(A==个人现金业务,B==个人其他业务,C==对公现金业务,D==对公其他业务)：");
char v;
scanf(" %c", &v); // 加一个空格，避免读入上一次的回车
getchar(); // 把读入的回车从缓冲区去掉

if (v < 'A' || v > 'D') {
printf("输入错误");
return;
}

WList p = Wlist;
WList min = NULL;
int start = 1;
while (p != NULL) {
if (!p->data.status && p->data.type == (v - 'A') && p->data.queue.length != MAX_QUEUE_NUM) {
if (start) {
min = p;
start = 0;
}
else if (min->data.queue.length > p->data.queue.length) { // 修改此处，使用 else if 避免出错
min = p;
}
}
p = p->next;
}

if (min == NULL) {
printf("业务还未添加");
return;
}

int customer = EnQueue(&min->data.queue);
SqQueue q = min->data.queue;
printf("请您到窗口编号 %d 区域等待，您的取号为%c%d-%02d，您前面有 %d 人正在排队", min->data.windowId, v, min->data.windowId, q.base[customer], q.length-1);
}

主要修改的地方是在 while 循环中，修改了两个地方：
1. 在找到第一个合适的窗口后，需要将 start 设置为 0，避免后续窗口无法被比较；
2. 在比较队列长度时，使用 else if 避免出错。

完善如下代码：#include<stdio.h> #include<stdlib.h> #define MAXSIZE 100 #define ERROR 0 #define OK 1 typedef int Status; typedef char ElementType; typedef struct TNode{ ElementType Data; struct TNode * Left; struct TNode * Right; }BiTNode,* BinTree; typedef struct QNode{ BinTree Data[MAXSIZE]; int front,rear; }* Queue; void LevelorderTraversal ( BinTree BT ); Queue CreatQueue(); Status IsFullQ(Queue Q); Status AddQ(Queue Q,BinTree X); Status IsEmptyQ(Queue Q); BinTree DeleteQ(Queue Q); BinTree CreatBinTree() { ElementType Data; BinTree BT, T; Queue Q = CreatQueue(); scanf("%c",&Data); if( Data != '@'){ BT = (BinTree)malloc(sizeof(struct TNode)); BT->Data = Data; BT->Left = BT->Right = NULL; AddQ(Q,BT); } else return NULL; while(!IsEmptyQ(Q)){ T = DeleteQ(Q); scanf("%c",&Data); if( Data == '@') T->Left = NULL; else{ T->Left = (BinTree)malloc(sizeof(struct TNode)); T->Left->Data = Data; T->Left->Left = T->Left->Right = NULL; AddQ(Q,T->Left); } scanf("%c",&Data); if(Data == '@') T->Right = NULL; else{ T->Right = (BinTree)malloc(sizeof(struct TNode)); T->Right->Data = Data; T->Right->Left = T->Right->Right = NULL; AddQ(Q,T->Right); } } return BT; } Queue CreatQueue() { Queue Q = (Queue)malloc(sizeof(struct QNode)); Q->front = Q->rear = 0; return Q; } Status IsFullQ(Queue Q) { if( (Q->rear+1)%MAXSIZE == Q->front ) return OK; else return ERROR; } Status AddQ(Queue Q,BinTree X) { if ( IsFullQ(Q) ) { printf("队列满"); return ERROR; } else { Q->rear = (Q->rear+1)%MAXSIZE; Q->Data[Q->rear] = X; return OK; } } Status IsEmptyQ(Queue Q) { if( Q->front == Q->rear ) return OK; else return ERROR; } BinTree DeleteQ(Queue Q) { if ( IsEmptyQ(Q) ) { printf("队列空"); return NULL; } else { Q->front = (Q->front+1)%MAXSIZE; return Q->Data[Q->front]; } } int main() { BinTree BT; BT = CreatBinTree(); if(BT == NULL){ printf("\n空树！\n"); }else{ printf("层序遍历的结果为："); LevelorderTraversal ( BT ); } return 0; }

#include <stdio.h>
#include <stdlib.h>

#define MAXSIZE 100
#define ERROR 0
#define OK 1

typedef int Status;
typedef char ElementType;

typedef struct TNode {
    ElementType Data;
    struct TNode *Left;
    struct TNode *Right;
} BiTNode, *BinTree;

typedef struct QNode {
    BinTree Data[MAXSIZE];
    int front, rear;
} *Queue;

void LevelorderTraversal(BinTree BT);
Queue CreatQueue();
Status IsFullQ(Queue Q);
Status AddQ(Queue Q, BinTree X);
Status IsEmptyQ(Queue Q);
BinTree DeleteQ(Queue Q);
BinTree CreatBinTree();

int main() {
    BinTree BT;
    BT = CreatBinTree();
    if (BT == NULL) {
        printf("\n空树！\n");
    } else {
        printf("层序遍历的结果为：");
        LevelorderTraversal(BT);
    }
    return 0;
}

BinTree CreatBinTree() {
    ElementType Data;
    BinTree BT, T;
    Queue Q = CreatQueue();
    scanf("%c", &Data);
    if (Data != '@') {
        BT = (BinTree) malloc(sizeof(struct TNode));
        BT->Data = Data;
        BT->Left = BT->Right = NULL;
        AddQ(Q, BT);
    } else return NULL;
    while (!IsEmptyQ(Q)) {
        T = DeleteQ(Q);
        scanf("%c", &Data);
        if (Data == '@')
            T->Left = NULL;
        else {
            T->Left = (BinTree) malloc(sizeof(struct TNode));
            T->Left->Data = Data;
            T->Left->Left = T->Left->Right = NULL;
            AddQ(Q, T->Left);
        }
        scanf("%c", &Data);
        if (Data == '@')
            T->Right = NULL;
        else {
            T->Right = (BinTree) malloc(sizeof(struct TNode));
            T->Right->Data = Data;
            T->Right->Left = T->Right->Right = NULL;
            AddQ(Q, T->Right);
        }
    }
    return BT;
}

Queue CreatQueue() {
    Queue Q = (Queue) malloc(sizeof(struct QNode));
    Q->front = Q->rear = 0;
    return Q;
}

Status IsFullQ(Queue Q) {
    if ((Q->rear + 1) % MAXSIZE == Q->front)
        return OK;
    else
        return ERROR;
}

Status AddQ(Queue Q, BinTree X) {
    if (IsFullQ(Q)) {
        printf("队列满");
        return ERROR;
    } else {
        Q->rear = (Q->rear + 1) % MAXSIZE;
        Q->Data[Q->rear] = X;
        return OK;
    }
}

Status IsEmptyQ(Queue Q) {
    if (Q->front == Q->rear)
        return OK;
    else
        return ERROR;
}

BinTree DeleteQ(Queue Q) {
    if (IsEmptyQ(Q)) {
        printf("队列空");
        return NULL;
    } else {
        Q->front = (Q->front + 1) % MAXSIZE;
        return Q->Data[Q->front];
    }
}

void LevelorderTraversal(BinTree BT) {
    Queue Q = CreatQueue();
    BinTree T;
    if (!BT) return;
    AddQ(Q, BT);
    while (!IsEmptyQ(Q)) {
        T = DeleteQ(Q);
        printf("%c", T->Data);
        if (T->Left) AddQ(Q, T->Left);
        if (T->Right) AddQ(Q, T->Right);
    }
}