/**
* 删除元素并返回
*/
ElementType DeleteQ(Queue *q) {
ElementType e;
if (IsEmptyQ(q)) {
printf("队列已空\r\n");
e = -1;
}
else{
e = q->data[q->front % MaxSize];
q->front++;
}
return e;
}
void AddQ(Queue * PtrQ,QueueElem item){
// if( !IsFullQ(PtrQ) ){ //无法简单判断是否已满，省去该步骤
QNode * t = (QNode*)malloc(sizeof(QNode));
t->Data = item;
t->Next = NULL;
if( IsEmptyQ(PtrQ) ){
PtrQ->front = PtrQ->rear = t;
PtrQ->front->Next = PtrQ->rear->Next = t;
}else{
PtrQ->rear->Next = t;
PtrQ->rear = t;
}
// }else{
// printf("Queue Full \n");
// }
return ;
}
void BFS(int i)
{
G->Visited[i] = 1;
printf("%d ", i);
AddQ(Q, i);
while (!IsEmptyQ(Q)) {
int j = DeleteQ(Q);
int k;
for (k = 0; k < G->n; k++) {
if (!G->Visited[k] && G->Edges[j][k]) {
G->Visited[k] = 1;
printf("%d ", k);
AddQ(Q, k);
}
}
}
}
QueueElem DeleteQ(Queue * PtrQ){
if( !IsEmptyQ(PtrQ) ){
QNode * FrontCell;
QueueElem FrontElem;
FrontCell = PtrQ->front;
FrontElem = FrontCell->Data;
if( PtrQ->front == PtrQ->rear ){ //只有一个元素
PtrQ->front = PtrQ->rear = NULL; //队列置为空
}else{
PtrQ->front = PtrQ->front->Next;
}
free(FrontCell);
return FrontElem;
}else{
printf("Queue Empty \n");
return 0;
}
}
