样例到第二行就崩，左、右儿子也判断不好，求助！

#include <cstdio>
//#include <cstring>
using namespace std;
int DaBiao[30];
struct node
{
	char data;
	int lchild = 0;
	int rchild = 0;
}Node[30];
int main()
{
	int n;
	scanf("%d", &n);
	for(int i = 1; i <= n; i++)
	{
		char l, r;
		scanf("%c", &Node[i].data);
		scanf("%c", &l);
		scanf("%c", &r);
		if(l != '*')
		{
			l = l - 'a' + 1;
			Node[i].lchild = l;
			DaBiao[l] = 1;
		}
		else
		{
			Node[i].lchild = 0;
		}
		
		if(r != '*')
		{
			r = r - 'a' + 1;
			Node[i].rchild = r;
			DaBiao[r] = 1;
		}
		else
		{
			Node[i].rchild = 0;
		}
	}
	return 0;
}