pl0.java

tiger编译器的驱动程序的描述 tiger编译器的驱动程序的描述

package ecust.edu.cn.pl0;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/*错误号
 0  ,"缺少左括号"
 1   ,"非法字符：赋值符号:="
 2  ,"等号后的字符为非法字符"
 3   ,"缺少等号"
 4   ,"声明过程中遇到的字符不是标识符"
 5   ,"缺少分号"
 6   ,"非法语句"
 7   ,"整数大小越界"
 8   ,"整数位数越界"
 9   ,"缺少右括号"   
 10   ,"语句和语句之间没有分号"
 11  ,"标识符不存在"
 12  ,"标识符不是变量名"
 13   ,"缺少赋值符号"
 14   ,"call后不是标识符"
 15   ,"call后不是过程名"
 16   ,"if后不是then"
 17   ,"没有遇到end"
 18   ,"while循环缺少do"
 19   ,"标识符长度越界"
 20   ,"缺少逻辑运算符"
 21   ,"标识符为过程名"
 22   ,"缺少右括号"

 */
public class pl0// 主程序
{
	public static void main(String[] args) {
		String filename = " ";
		//new pl0();// 初始化一个PL0对象
		System.out.print("请输入PL源程序的文件名:");
		try {
			
			InputStreamReader fin = new InputStreamReader(System.in);
			BufferedReader br = new BufferedReader(fin);
			filename = br.readLine();
		} catch (IOException e) {
			System.out.println("错误!请输入源程序文件名");
		}
		// 声明一个词法分析类,获得源程序的第一个词(token)
		CiFaAnalyse Cifa = new CiFaAnalyse(filename);
		YuFaAnalyse YuFa = new YuFaAnalyse(Cifa);
		int errorNumber = Cifa.getErroNumber() + YuFa.getErroNumber();
		if (errorNumber == 0) {
			YuFa.printCode();
			System.out.println("错误总数为" + errorNumber);
			YuFa.interpret();
		} else {
			System.out.println("错误总数为" + errorNumber);
		}
		// YuFa.printCode();
		// YuFa.printName();

	}
}