顺序队列删除指定队列中的队尾元素，那里不对，为啥出不来🥹

#include"SqQueue.cpp"
#include
int Geth(SqQueue &sq ,int n)
{
char a,b;
int i;
while(!QueueEmpty(sq))
{
DeQueue(sq,a);
}
for(i=0;i
{
EnQueue(sq,b);
}

}
int main ()
{ SqQueue sq;
int i,rear,front,x;
char f;
char A[]="2110919";
sq.rear=sq.front=0;
int n=(rear-front+MaxSize)%MaxSize;
for(i=0;i<=n;i++)
{
EnQueue(sq,A[i]);
}
Geth(sq,n);
while(!QueueEmpty(sq))
{
DeQueue(sq,f);
printf("%c",f);
}
}