int main(int argc, const char* argv[])
{
	int x = 5;
	int* p = &x;
	*p = 6;
	int** q = &p;
	int*** r = &q;
	printf("%d\n", *p);//指向p中的值  6
	printf("%d\n", *q);// 指向指针p的地址  
	printf("%d\n", *(*q));//指向p中地址中的值  6
	printf("%d\n", *(*r));// 解引用两次到达p
	printf("%d\n", *(*(*r)));//解引用三次到达x
	
	***r = 10;
	printf("x=%d\n", x);//解引用，修改x中的值

	**q = *p + 2; //*p  **q解引用都是到的值,x的值+2
	printf("x=%d\n", x);
}