baum

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

struct Knoten
{
    int data;
    struct Knoten *links;
    struct Knoten *rechts
    };

void preorder(struct Knoten *r);
void inorder(struct Knoten *r);
void postorder(struct Knoten *r);
struct Knoten *Insert(struct Knoten *root, int new_knoten_value);

int main()
{
    char number[10];
    int a[]= {8,9,11,15,19,20,21,7,3,2,1,5,6,4,13,14,10,12,17,16,18};
    int alength=21;
    int i;
    int j;
    int zahl;
    char *eptr=NULL;
    int endeSize=4;
    char endeString="ende";



    while(strlen(number)!= endeSize && strncmp(number,endeString,endeSize)!=0){
        printf("Bitte geben Sie eine Zahl ein:");
        gets(number);
        zahl=strtol(number,&eptr,10);
    }
























    return EXIT_SUCCESS;
}