notebook.java

symbman（大学作业）

import java.util.Iterator;
import java.io.*;

public class Notebook {

	public Notebook(String fn) throws IOException {
		ExpressionReader er = new ExpressionReader(fn);
		
		try {
			Iterator it = er.iterator();
			while(it.hasNext()) {
				Expression e = (Expression)it.next();
				System.out.println("Eseguo " + e);
				e.eval();
			}
		} catch(InvalidExpressionException e) {
			System.out.println( e + " non rappresenta un'espressione valida");
		}
		finally {
			er.close();
		}
	}
	
}