问获取输入并使用它初始化数组工作，但根据C语言，它不应该

EN

int n;
int [n];

#include <stdio.h>
int main()
{
    int t,n;
    int rear;
    int front;
    scanf("%d",&t);
    while(t--)
    {

        scanf("%d",&n);
        int a[n],s[n];
        int temp;
        for(int i=0;i<n;i++)
            a[i]=i+1;
        front=0;
        rear=n-1;
        
        //rotation
        for(int i=1;i<=n;i++)
        {
            for(int j=1;j<=i;j++)
            {
                temp=a[front];
                if(front == rear)
                {
                front = -1;
                rear = -1;
                }
                else
                {
                front = (front+1) % n;
                }

                //dequeue
                if(front == -1)
                {
                front = 0;
                }
                rear = (rear + 1) % n;

                a[rear] = temp;
                //enqueue
            }
            temp=a[front];
            if(front == rear)
            {
                front = -1;
                rear = -1;
            }
            else
            {
                front = (front+1) % n;
            }
            s[temp-1]=i;
            //dequeue

        }
        for(int i=0;i<n;i++)
        printf("%d\t",s[i]);
        printf("\n");
       

    }
    return 0;
}