pointer-array.c

//Pointer to an Array in C
//double balance[50];
//balance is a pointer to &balance[0], which is the address of the first element of the array balance. Thus, the following program fragment assigns p as the address of the first element of balance

double *p;
double balance[10];

p = balance;

//*(balance + 4) is a legitimate way of accessing the data at balance[4].
//Once you store the address of the first element in 'p', you can access the array elements using *p, *(p+1), *(p+2) and so on. 

//Example

#include <stdio.h>

int main () {

   /* an array with 5 elements */
   double balance[5] = {1000.0, 2.0, 3.4, 17.0, 50.0};
   double *p;
   int i;

   p = balance;

   /* output each array element's value */
   printf( "Array values using pointer\n");

   for ( i = 0; i < 5; i++ ) {
      printf("*(p + %d) : %f\n",  i, *(p + i) );
   }

   printf( "Array values using balance as address\n");

   for ( i = 0; i < 5; i++ ) {
      printf("*(balance + %d) : %f\n",  i, *(balance + i) );
   }

   return 0;
}