pointer subtraction

 #include <stdio.h>

int main(){

int a[]={3,5,6};

int * ptr1=&a[0];

int * ptr2=&a[1];

printf("The value of ptr1 is: %u\n",ptr1);

printf("The value of ptr2 is: %u\n",ptr2);

printf("The difference of ptr2 and ptr1 is %u\n", ptr2-ptr1);

 return 0;

}