求助：数据结构的作业

#include <stdio.h>

typedef struct bitnode
{
char data;
struct bitnode *lchild, *rchild;
}bitnode, *bitree;

void createbitree(t,n)
bitnode ** t;
int *n;
{
char x;
bitnode *q;

*n=*n+1;
printf(" Input %d DATA: ",*n);
x=getchar();
if(x!='\n') getchar();

if (x=='^')
return;

q=(bitnode*)malloc(sizeof(bitnode));
q->data=x;
q->lchild=NULL;
q->rchild=NULL;
*t=q;

printf("This Address is:%o,Data is:%c, Left Pointer is:%o,Right Pointer is: %o\n",q,q->data,q->lchild,q->rchild);

createbitree(&q->lchild,n);
createbitree(&q->rchild,n);
return;
}

void visit(e)
bitnode *e;
{
printf(" Address: %o, Data: %c, Left Pointer: %o, Right Pointer: %o\n",e,e->data,e->lchild,e->rchild);