1:  package compiler;

2:   

3:  import java.io.BufferedWriter;

4:  import java.io.FileWriter;

5:   

6:  /**

7:   * 组织输入输出接口

8:   *

9:   * @author jiangnan

10:   */

11:  public class PL0 {

12:   

13:

14:      public static final String pcodeFile = "d:\\pcode.txt";

15:      public static final String tableFile = "d:\\table.txt";

16:      public static final String runtimeFile = "d:\\runtime.txt";

17:      public static final String errFile = "d:\\error.txt";

18:      public static final String inputFile="d:\\input.txt";

19:      public static BufferedWriter pcodeWriter;                 //输出虚拟机代码

20:      public static BufferedWriter runtimeWriter;               //输出结果

21:      public static BufferedWriter tableWriter;                //输出名字表

22:      public static BufferedWriter errWriter;                   //输出错误信息

23:   

24:      public Praser praser;

25:   

26:      public PL0(String filepath) {

27:          Scanner scan = new Scanner(filepath);

28:          praser = new Praser(scan,//词法分析器

29:                  new SymbolTable(),//名字表

30:                  new Interpreter());

31:      }

32:   

33:      public boolean compile() {

34:          try {

35:              pcodeWriter = new BufferedWriter(new FileWriter(pcodeFile));

36:              tableWriter = new BufferedWriter(new FileWriter(tableFile));

37:              runtimeWriter = new BufferedWriter(new FileWriter(runtimeFile));

38:              errWriter = new BufferedWriter(new FileWriter(errFile));

39:              praser.nextsym();                                    //前瞻分析需要预先读入一个符号

40:              praser.parse();                                        //开始语法分析过程（连同语法检查，目标代码生成）

41:              pcodeWriter.close();

42:              tableWriter.close();

43:              runtimeWriter.close();

44:              errWriter.close();

45:          } catch (Exception e) {

46:              e.printStackTrace();

47:              System.out.println("***compile error***");

48:          } finally {

49:   

50:          }

51:          //编译成功是指完成编译过程并且没有错误

52:          return (praser.myErr.errCount == 0);

53:      }

54:  }