pl0.java

pl0编译器的java版本

import java.io.*;

public class PL0 {
	
    public static void main(String args[]) throws IOException {
        BufferedReader in
           = new BufferedReader(new InputStreamReader(System.in));

        System.out.println("Please input the pl/0 file:");
        String src = in.readLine();
        System.out.println("Please input the result file name:");
        String res = in.readLine();
        
        try {
            BufferedReader inp = new BufferedReader(new FileReader(src));
            PrintWriter outp = new PrintWriter(new FileOutputStream(res), true);

            Parse p = new Parse();
            CodeSegment cs = p.doScan(inp, outp);
        
            if (cs != null) {
                cs.interpret(outp);
                System.out.println("Successfully finished this pl/0 program");
            } else {
                System.out.println("Errors in pl/0 program");
                outp.println("Errors in pl/0 program");
            }
        } catch (Exception e) {
            e.printStackTrace();
        }       
    }
}