pointer concept in c

#include<stdio.h>

#include<conio.h>

void main()

{

int i;

static int a[]={0,1,2,3,4};

int *p[]={a,a+1,a+2,a+3,a+4};

int **ptr=p;

clrscr();

for(i=0;i<5;i++)

{

printf("a=%d\n",&a[i]);

printf("p is address=%d\n",p[i]);

printf("p value=%d\n",*p[i]);

printf("*ptr=%d\n",*ptr[i]);

printf("\n**ptr=%\dn",**ptr);

printf("\nBREAK\n" );

}

output

a=170

p is address=170

p value=0

*ptr=0

**ptr=0n

BREAK

a=172

p is address=172

p value=1

*ptr=1

**ptr=0n

BREAK

a=174

p is address=174

p value=2

*ptr=2

**ptr=0n

BREAK

a=176

p is address=176

p value=3

*ptr=3

**ptr=0n

BREAK

a=178

p is address=178

p value=4

*ptr=4

**ptr=0n

BREAK