求解关于哈夫曼树的问题

#define MAXVALUE 32767
#define MAXLEAF 8
#define MAXNODE MAXLEAF*2-1
#include <stdio.h>
typedef struct hnode
{
  int weight;
  int lchild,rchild;
  int parent;
}HTNode;

typedef struct Code
{
  int bits[MAXLEAF];
  int start;
  char ch;
}HCodeType;

void Huffman_tree(HTNode Ht[MAXNODE])
{
  int i,j,m1,m2,p1,p2;
  for(i=0;i<MAXNODE;i++)
  {
    Ht[i].parent=-1;
    Ht[i].lchild=-1;
    Ht[i].rchild=-1;
  }
  for(i=MAXLEAF;i<MAXNODE;i++)
  {
    m1=m2= MAXVALUE;
    p1=p2=0;
    for(j=0;j<i-1;j++)
    {
      if(Ht[j].weight<m1&&Ht[j].weight==-1)
      {
        m2=m1;
        p2=p1;
        m1=Ht[j].weight;
        p2=j;
      }
      else if(Ht[j].weight<m2&&Ht[j].weight==-1)
      {
        m2=Ht[j].weight;
        p2=j;
      }
    }
    Ht[p1].parent=i;
    Ht[p2].parent=i;
    Ht[i].lchild=p1;
    Ht[i].rchild=p2;
    Ht[i].weight=Ht[p1].weight+Ht[p2].weight;
  }
}

void Huffman_code(HTNode Ht[MAXNODE],HCodeType HuffCode[MAXLEAF])
{
  HCodeType cd;
  int c,p,i,j;
  for(i=0;i<MAXLEAF;i++)
  {
    cd.start=MAXLEAF;
    c=i;
    p=Ht[i].parent;
    while(p!=-1)
    {
      cd.start--;
      if(Ht[p].lchild==c)
    cd.bits[cd.start]='0';
      else cd.bits[cd.start]='1';
      c=p;
      p=Ht[p].parent;
    }
    cd.start++;
    for(j=cd.start;j<=MAXLEAF;j++)
        HuffCode[i].bits[j]=cd.bits[j];
    HuffCode[i].start=cd.start;
  }
}

void display(HCodeType HuffCode[MAXLEAF])
{
    int i, k;
    for(i=0;i<MAXLEAF;i++)
    {
        printf("%c:\t",HuffCode[i].ch);
        for(k=HuffCode[i].start;k<=MAXLEAF;k++)
            printf("%c",HuffCode[i].bits[k]);
        printf("\n");
    }
}

void main()
{
  HTNode Ht[MAXNODE];
  HCodeType HuffCode[MAXLEAF];
  int i,j;
  printf("please input 8 leafs' weight:\n");
  for(i=0;i<MAXLEAF;i++)
    scanf("%d",&Ht[i].weight);
  printf("qing shu ru zi fu:\n");
  for(j=0;j<MAXLEAF;j++)
    scanf("%c",&HuffCode[j].ch);
  Huffman_tree(Ht);
  Huffman_code(Ht,HuffCode);
  printf("please output huffman bian ma:\n");
  display(HuffCode);
}

大家帮帮忙呀，为什么运行后没有输出呀。。。