#include<stdio.h>

#include<malloc.h>

void main(){

        double ***p;

        p = (double ***) malloc( sizeof(*p) );    // sizeof(double **)

        *p = (double **) malloc( sizeof(**p) );   // sizeof(double *)

        **p = (double *) malloc( sizeof(***p) );  // sizeof(double)

        ***p = 3.14;

        printf("&p : %pn", &p);

        printf("p : %pn", p);

        printf("*p : %pn", *p);

        printf("**p : %pn", **p);

        printf("***p : %gnn", ***p);

        printf("sizeof(p) : %dn", sizeof(p));

        printf("sizeof(*p) : %dn", sizeof(*p));

        printf("sizeof(**p) : %dn", sizeof(**p));

        printf("sizeof(***p) : %dn", sizeof(***p));

        free(**p);

        free(*p);

        free(p);

}