数组跟指针间接级别不一样怎么办

#include <stdio.h>
int main()
{
int i = 0,left,right;
char a[1000];
char* p = &a;
printf("请输入字符串：");
while ((a[i] = getchar()) != '\n')
{
i++;
}
right = i-1;
for (left = 0; left <= right; left++, right--)
{
if (*(p + left) != *(p + right))
{
printf("该字符串不是回文\n");
break;
}
}
printf("该字符串是回文");
return 0;

}