wayne

/* * stack.c * *  Created on: 30.10.2009 * *	aus stack.h: *  struct stacks{ *   int wert; *   struct stacks *next; *  }; *  typedef struct stacks stack; */#include <stdio.h>#include <stdlib.h>#include "stack.h"stack* newStack() {	stack *stackp;	stackp = malloc( sizeof(stack) );	stackp->next = NULL;	return stackp;}void push(stack *s, int i) {	stack *newstack = newStack();	newstack->wert = i;	newstack->next = s;	s = newstack;}int top(stack *s){	if (isEmpty(s) == 0) {		printf("top = %i\n", s->wert);		return 0;	} else {		printf("Fehler: Stack ist leer!\n");		return -1;	}}int pop(stack* s){	if (isEmpty(s) == 0) {		printf("pop %i\n", s->wert);		stack *leer = s;		s = s->next;		free(leer);		return 0;	} else {		printf("Fehler: Stack ist leer!\n");		return -1;	}}int isEmpty(stack* s){	if ((s->next == NULL)) {		return 1;	} else {		return 0;	}}void printStack(stack* s){	stack *active = s;	while (active != NULL) {		printf("%i\n", active->wert);		active = active->next;	}}