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76
uebung5/aufgabe3.c
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76
uebung5/aufgabe3.c
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#include <stdio.h>
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#include <stdlib.h>
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struct Stack{
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int data;
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struct Stack *ptr;
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};
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struct Stack *top = NULL;
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int isEmpty(){
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return (top == NULL);
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}
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void Push(int item){
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struct Stack *temp = (struct Stack *) malloc(sizeof(struct Stack));
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temp->ptr = top;
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temp->data = item;
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top = temp;
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}
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int Pop(){
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if (top == NULL){
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printf("Stack ist leer!\n");
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return -1;
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}
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struct Stack *temp = top->ptr;
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int popped = top->data;
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free(top);
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top = temp;
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return popped;
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}
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int Top(){
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if(isEmpty()) {
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printf("Stack ist leer!\n");
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return -1;
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}
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return top->data;
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}
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int Size(){
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if(isEmpty())
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return 0;
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struct Stack *next = top->ptr;
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int size = 1;
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for (; next != NULL; next = next->ptr) {
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size++;
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}
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return size;
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}
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int main(){
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// Hinzufügen von Beispieldaten
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Push(1);
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Push(2);
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Push(3);
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// Anzeige des obersten Elements und der Größe vom Stack
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printf("Top-Element: %d\n", Top());
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printf("Stack-Größe: %d\n", Size());
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// Entfernung eines Elements
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int popped = Pop();
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if (popped != -1) {
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printf("Entferntes Element: %d\n", popped);
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}
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// Anzeige des obersten Elements und der Größe vom Stack nach der Entfernung
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printf("Top-Element nach Pop: %d\n", Top());
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printf("Stack-Größe nach Pop: %d\n", Size());
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return 0;
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}
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