/*-------------------------------------------------------------------*/
/* stack.h (Version 3: Data Modules)                                 */
/*-------------------------------------------------------------------*/

#ifndef STACK_INCLUDED
#define STACK_INCLUDED

extern void Stack_new(int iMaxSize);
/* Create a new Stack that is able to store iMaxSize items, each of 
   type double. */

extern void Stack_free();
/* Free the Stack. */

extern void Stack_push(double dItem);
/* Push dItem onto the Stack. */

extern double Stack_pop();
/* Pop the Stack, and return the popped item. */

extern int Stack_empty();
/* Return 1 (TRUE) iff the Stack is empty. */

extern int Stack_full();
/* Return 1 (TRUE) iff the Stack is full. */

/* 
Checked runtime errors:
   Call Stack_new with iMaxSize <= 0.
   Call Stack_push with *psStack full.
   Call Stack_pop with *psStack empty.
*/

#endif