#include <stdio.h>
 int counter = 0;
   void setup() {
    Serial.begin(9600);
   int test1 = 10;
   float test2 = 3.14159;
   char test3[ ] = "This is a character array";
   int *ptr1;
   float *ptr2;
 char *ptr3;
  ptr1 = &test1;
Serial.print("The integer value is stored at ");
Serial.print( (long) &ptr1, DEC);


  }
 void loop() {

    }