333333.txt

1、用二叉链表作为存储结构

#include "stdio.h"
#include "string.h"
#define NULL 0
typedef struct BiTNode{
    char data;
    struct BiTNode *lchild,*rchild;
}BiTNode,*BiTree;
BiTree Create(BiTree T){
    char ch;
    ch=getchar();
    if(ch=='#')
T=NULL;
    else{
if(!(T=(BiTNode *)malloc(sizeof(BiTNode))))
    printf("Error!");
T->data=ch;
T->lchild=Create(T->lchild);
T->rchild=Create(T->rchild);
    }
    return T;
}
void Preorder(BiTree T){
     if(T){
 printf("%c",T->data);
 Preorder(T->lchild);
 Preorder(T->rchild);
}
}
int Sumleaf(BiTree T){
    int sum=0,m,n;
    if(T){
      if((!T->lchild)&&(!T->rchild))
  sum++;
      m=Sumleaf(T->lchild);
      sum+=m;
      n=Sumleaf(T->rchild);
      sum+=n;
    }
    return sum;
}
void zhongxu(BiTree T){
    if(T){
zhongxu(T->lchild);
printf("%c",T->data);
zhongxu(T->rchild);
}
}
void houxu(BiTree T){
    if(T){
houxu(T->lchild);
houxu(T->rchild);
printf("%c",T->data);
}
}
int Depth(BiTree T){
    int dep=0,depl,depr;
    if(!T) dep=0;
    else{
depl=Depth(T->lchild);
depr=Depth(T->rchild);
dep=1+(depl>depr?depl:depr);
}
    return dep;
}
main(){
    BiTree T;
    int sum,dep;
    T=Create(T);
    Preorder(T);
    printf("\n");
    zhongxu(T);
    printf("\n");
    houxu(T);
    printf("\n");
    sum=Sumleaf(T);
    printf("%d",sum);
    dep=Depth(T);
    printf("\n%d",dep);
}