/*
?*?PL/0?complier?program?for?win32?platform?（implemented?in?C）
?*
?*?The?program?has?been?test?on?Visual?C++?6.0?Visual?C++.NET?and
?*?Visual?C++.NET?2003?on?Win98?WinNT?Win2000?WinXP?and?Win2003
?*
?*?使用方法：
?*?運(yùn)行后輸入PL/0源程序文件?
?*/

#include?
#include?
#include?“pl0.h“
#include?“string.h“

//?分割符，0表示0個(gè)‘--‘，1表示1個(gè)，以此類推
int?Tree_level[500];
//?存單詞
char*?Tree[500];?
//?數(shù)單個(gè)個(gè)數(shù)
int?word_num?=?0;

void?Gen_grammerTree（）{
	int?i=0;?
	printf（“\nGrammer?Tree\n“）;
????for（i=0?;?i????????switch?（Tree_level[i]）
	????{
		????case?0:
		????	printf（“%s\n“Tree[i]）;
		????????break;
		????case?1:
		????	printf（“--%s\n“Tree[i]）;
		????????break;
		????case?2:
		????????printf（“----%s\n“Tree[i]）;
		????????break;
		????case?3:
		????????printf（“------%s\n“Tree[i]）;
		????????break;
		????case?4:
		????????printf（“--------%s\n“Tree[i]）;
		????????break;
		????case?5:
		????????printf（“----------%s\n“Tree[i]）;
		????????break;
		????case?6:
		????????printf（“------------%s\n“Tree[i]）;
		????????break;
		????case?7:
		????????printf（“--------------%s\n“Tree[i]）;
		????????break;
		????case?8:
		????????printf（“----------------%s\n“Tree[i]）;
		????????break;
		????case?9:
		????????printf（“------------------%s\n“Tree[i]）;
		????????break;
		????case?10:
		????????printf（“--------------------%s\n“Tree[i]）;
		????????break;
		????case?11:
		????????printf（“----------------------%s\n“Tree[i]）;
		????????break;
		????case?12:
		????????printf（“------------------------%s\n“Tree[i]）;
		????????break;
		????case?13:
		????????printf（“--------------------------%s\n“Tree[i]）;
		????????break;
		????case?14:
		????????printf（“----------------------------%s\n“Tree[i]）;
		????????break;
		????case?15:
		????????printf（“------------------------------%s\n“Tree[i]）;
		????????break;
		????case?16:
		????????printf（“--------------------------------%s\n“Tree[i]）;
		????????break;
		????default:
		????	printf（“越界??！“Tree[i]）;
		????????break;
	????}
????}
}

int?main（）
{
????printf（“Input?pl/0?file????“）;
????scanf（“%s“?fname）;?????/*?輸入文件名?*/

????//?打開一個(gè)文件?返回文件指針:?FILE類型的指針變量?指向該文件
????fin?=?fopen（fname?“r“）;

????if?（fin）
????{
????????init（）;?????/*?初始化?*/

????????err?=?0;????//?計(jì)算已發(fā)現(xiàn)的錯(cuò)誤個(gè)數(shù)
????????//?cc、ll:?getch使用的計(jì)數(shù)器?cc表示當(dāng)前字符
????????//?cx虛擬機(jī)代碼指針?取值范圍[0?cxmax-1]
????????cc?=?cx?=?ll?=?0;
????????//?緩沖區(qū)中獲取字符，getch?使用?初始化為一個(gè)空格
????????ch?=?‘?‘;

????????//?首次讀一個(gè)字符?后面的在block里完成?其是遞歸程序
????????if（-1?!=?getsym（））
????????{
????????????//?記錄語法樹
????????????int?Grammer_level?=?0;
????????????Tree_level[word_num]?=?Grammer_level;
????????????Tree[word_num]?=?“?<程序>“;
????????????word_num+=1;
????????????//?三個(gè)參數(shù)?1:?當(dāng)前分程序所在層?2:?名字表當(dāng)前尾指針?第三個(gè)就是標(biāo)識(shí)了3種聲明和6種語句的bool數(shù)組
????????????//?第四個(gè)參數(shù)，表示語法樹層數(shù)
????????????if（-1?==?block（0?0?Grammer_level+1））???/*?調(diào)用編譯程序?*/
????????????{
????????????????fclose（fin）;
??????