C/C++ 指向指针的指针

#include <stdio.h>

int main()
{
int a = 100;
int *p = &a;
int **p2 = &p;
printf("&a   = %d\n",&a);
printf("p    = %d\n",p);
printf("*p   = %d\n",*p);
printf("p2   = %d\n",p2);
printf("*p2  = %d\n",*p2);
printf("**p2 = %d\n",**p2);

return 0;
}

&a   = 1725882484
p    = 1725882484
*p   = 100
p2   = 1725882488
*p2  = 1725882484
**p2 = 100