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


void printSize(double arr[]);

int main(int argc, char *argv[])
{
    double *p;
    double arr[42];

    printf("%d\n", (int)sizeof p);
/*    printf("%p\n", p);*/
    printf("%d\n", (int)sizeof &arr[0]);  /* addr of 1st elem */
/*    printf("%p\n", &arr[0]);
      printf("%p\n", &arr[1]);*/
    printf("%d\n", (int)sizeof arr);  /* sizeof the entire block (array) */
/*    printf("%p\n", arr);*/
    printf("%d\n", (int)(sizeof arr/sizeof arr[0]));  /* number of elements */
    printSize(arr);  /* but what does this print? */
    printf("arr[3] = %f\n", arr[3]);
    return 0;
}

void printSize(double arr[])
{int x =0;

    printf("%d\n", (int)sizeof arr);
    /* same as sizeof(double *) */
    arr[3] = 42;
    printf("arr[3] = %f\n", arr[3]);    
}