去掉相同的数据{且它们相邻

问题遇到的现象和发生背景
用代码块功能插入代码，请勿粘贴截图
我想要达到的结果
#include
int main()
{ int n,k,m,i,j,t;

 scanf("%d",&m);
 int a[n];
 for(i=0;iscanf("%d",&a[i]);}
  for(i=0;ifor(j=i+1;j<=m;j++)
  {if(a[i]==a[j]) 
    { for(t=j;t-1;t++)
     {
     a[t]==a[t+1];
     j--;
     m--;}
    }
 }} printf("%d",m);
    printf("\n");
 for(j=0;jprintf("%d ",a[j]);
 }
  return 0;
}

![img](https://img-mid.csdnimg.cn/release/static/image/mid/ask/959295428766124.png "#left")

修改如下，供参考：

#include <stdio.h>
#define N 20
int main()
{
    int i, j, n, a[N],flg;
    scanf("%d", &n);
    for (i = 0; i < n; i++)
        scanf("%d", &a[i]);
    for (flg = a[0],i = 0,j = 0; i < n; i++)
    {
        if (a[i] - flg)
            a[j++] = a[i];
        if (i == 0)
            a[j++] = a[i];
        flg = a[j-1];
    }

    printf("删除相邻重复元素后的数组:\n");
    for (i = 0; i < j; i++)
        printf("%4d", a[i]);
    printf("\n");
    return 0;
}