#include <stdio.h>
#include <stdlib.h>

// point to the next int
void incrP(int* p){
  (*p)++;  // () necessary, what happens without them?
}

main() {
  //int i
 int i=10;
 //pinter to int dp
 int *dp;
 // array A: a CONSTANT pointer to the first of a sequence of ints
 int A[3] = {0,1,2};

 // gcc does a compile time bounds check and issues a warning
 // eg for int B[3] = {0,1,2,3};  

 // we can assign an array to a pointer
 dp = A;
 printf("dp=A;  *dp=%d\n", *dp);

 // An array is not a pointer variable, but a pointer constant
 // so we cannot assign new address to A  as in
 // A = &i; 

 // &: address of operator,    *: follow reference (dereference) operator
 dp = &i;
 printf("dp=&i; *dp=%d\n", *dp);

 printf("A after inrcP(A): { %d, %d, %d }\n", A[0], A[1], A[2]);
 incrP(A);
 printf("A after inrcP(A): { %d, %d, %d }\n", A[0], A[1], A[2]);

 incrP(dp);
 printf("i after inrcP(dp): %d\n", i);
}