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

int main ()
{
  double *doublePtr;
  char *charPtr;

  printf ("The number of bytes needed by a double: %d\n", sizeof(double));
  printf ("The number of bytes needed by a char: %d\n", sizeof(char));

  // Get the space from malloc:
  doublePtr = (double*) malloc (sizeof(double));
  charPtr = (char*) malloc (sizeof(char));

  // Print the address of the memory block returned by malloc:
  printf ("double pointer is at location: %p\n", doublePtr);
  printf ("char pointer is at location: %p\n", charPtr);

  // Assign values and print:
  *doublePtr = 3.141;
  *charPtr = 'A';

  printf ("double value = %lf   char value = %c\n", *doublePtr, *charPtr);

  // Free the memory when done:
  free (doublePtr);
  free (charPtr);

}