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我的是用树做的,为什么会wrong呢?牛人来帮我看一下

Posted by songsong2008 at 2006-06-09 10:50:24 on Problem 1002
#include <stdio.h>
char *a;
int duplicate=0;
typedef struct tree
{
int cnt;
char c;
struct tree * firstchild;
struct tree * nextsibling;
}Tree;
char convert(char c)
{
if(c>'P')
c--;
return (c-'A')/3+2+'0';
}
void insert(char* number,int i,Tree * root)
{
//while(*number=='-')
//number++;
//if(strlen(number)==0)
//return 0;
Tree *p,*q;
if(i>=7)
return;
if(*number>'9' || *number<'0')
{
//printf("before convert %c\n",*number);
*number=convert(*number);
//printf("after convert %c\n",*number);
}
p=q=root->firstchild;
for(;(p!=NULL) && (p->c<*number);q=p,p=p->nextsibling);
//printf("%Tc",p->c);
if(root->firstchild==NULL || p==NULL || (p!=NULL&&p->c>*number))
{
//printf("new%c",*number);
Tree * tmp=new Tree;
if(i==6)
tmp->cnt=1;
tmp->c=*number;
tmp->firstchild=NULL;
if(root->firstchild==NULL)
{
tmp->nextsibling=NULL;
root->firstchild=tmp;
}
else if(p==root->firstchild)//新来的作为firstchild,忘了这种情况
{
tmp->nextsibling=p;
root->firstchild=tmp;
}
else
{
q->nextsibling=tmp;
tmp->nextsibling=p;
}
insert(++number,++i,tmp);
}//if NULl
else if(p->c==*number)
{
//printf("NotNew%c",p->c);
if(i==6)
{
p->cnt++;
return;
}
else
insert(++number,++i,p);
}//else !NULL
}
void travel(Tree * root,int i)
{
Tree *p;
if(i==7)
{
p=root;
//for(p=root->firstchild;p;p=p->nextsibling)//一个递归程序都写不好。。。。。
//{
if(p->cnt>=2)
{
duplicate=1;
//a[i]=p->c;
for(int j=0;j<7;j++)
{
if(j==3)
printf("-");
printf("%c",a[j]);
}//for j
printf(" %d\n",p->cnt);
}//if
//}//for
}
else
{
for(p=root->firstchild;p;p=p->nextsibling)
{
a[i]=p->c;
travel(p,i+1);
}
}
}
void main()
{
int n;
char c;
char tmp[8];
char * p=tmp;
Tree * root=new Tree;
root->firstchild=NULL;
root->nextsibling=NULL;
a=new char[7];
scanf("%d\n",&n);
for(int i=0;i<n;i++)
{
for(int j=0;j<7;j++)
{
scanf("%c",&c);
if((c>='A'&&c<='Z') || (c>='0' && c<='9'))
tmp[j]=c;
else
j--;
}//for
tmp[7]='\0';
printf("%s\n",tmp);
insert(p,0,root);
}
travel(root,0);
if(duplicate==0)
printf("No duplicates.\n");
}

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