#include<iostream.h>
#include<iostream>
#include"head.h"
extern int index;
extern WORDS word[20];
extern int array[20];

int F(int);
int G(int);
int T(int);
int E(int);
void Grammar(int length)
{
	
	int i=0;
	while((i<length)&&(word[i].ID!=99))
	{
		i=E(i);
		if(word[i].ID==99)
		{
			cout<<"語法錯(cuò)誤！請輸入正確的句子"<<endl;
			exit(0);
		}
	}

}
int E (int i)
{
	int ii;
	i=T(i);
	while (word[i].ID==1||word[i].ID==2)
	{
		ii=i;
		i++;					//向前移動(dòng)一個(gè)位置
		i=T(i);	
		array[index]=ii;//
		index++;
	}
	return i;
}

int T(int i)
{
	int ii;
	i=G(i);
	while(word[i].ID==4||word[i].ID==5||word[i].ID==6||word[i].ID==7||word[i].ID==8||word[i].ID==9)
	{
		ii=i;
		i++;				//向前移動(dòng)一個(gè)位置
		i=G(i);
		array[index]=ii;
		index++;
	}
	return i;
}
int G(int i)
{
	int ii;
	i=F(i);
	while(word[i].ID==3)
	{
		ii=i;
		i++;
		i=F(i);
		array[index]=ii;
		index++;
	}
	return i;
}
int F(int i)
{
	if (word[i].ID==0)		//處理標(biāo)識符
	{
		array[index]=i;
		index++;
		i++;
	}
    else
	{
		if(word[i].ID==10)
		{
			i++;				//ADVANCE();
			i=E(i);
			if (word[i].ID==11)
				i++;			//ADVANCE();
			else
				word[i].ID=99;
		}
		else if(word[i].ID==3)
			;
		else
		{
			cout<<"括號不匹配!請輸入正確句子 "<<endl;
			exit(0);
			word[i].ID=99;//ERROR();
		}
	}
	return i;
}