#include <stdio.h>
#define TABLE_SIZE 11

void f (const double p[TABLE_SIZE]){
  int i;

  for(i = 0; i < TABLE_SIZE; i++)
    p[i] = p[i] * 2;  // Compile time error: 
                      // Assignment of read only location

}

int main(void) {

  double a[TABLE_SIZE];
  int i;

  for(i = 0; i < TABLE_SIZE; i++)
    a[i] = 2*i;

  for(i = 0; i < TABLE_SIZE; i++)
    printf("Before calling f: a[%d] = %f\n", i, a[i]);

  printf("\n");

  f(a);  // The array a is passed as a pointer.

  for(i = 0; i < TABLE_SIZE; i++)
    printf("After calling f: a[%d] = %f\n", i, a[i]);

  return 0;
}