Doble-Spiel/stack.c

42 lines
910 B
C

#include <stdlib.h>
#include "stack.h"
//TODO: grundlegende Stackfunktionen implementieren:
/* * `push`: legt ein Element oben auf den Stack,
* `pop`: entfernt das oberste Element,
* `top`: liefert das oberste Element zurück,
* `clearStack`: gibt den gesamten Speicher frei. */
// Pushes data as pointer onto the stack.
StackNode *push(StackNode *stack, void *data)
{
//Speicher reservieren
StackNode *newNode = malloc(sizeof(StackNode));
if (!newNode)
return stack;
newNode->data = data;
newNode->next = stack;
return newNode;
}
// Deletes the top element of the stack (latest added element) and releases its memory. (Pointer to data has to be
// freed by caller.)
StackNode *pop(StackNode *stack)
{
}
// Returns the data of the top element.
void *top(StackNode *stack)
{
}
// Clears stack and releases all memory.
void clearStack(StackNode *stack)
{
}