/** Driver.java for lab 3
 *  We want to create top-down parsers for this grammar:
 *    prog --> stmt | stmt prog
 *    stmt --> id = num ; | expr ;
 *    expr --> id | num | expr expr op
 *    op   --> + | - | * | /
 *  where the tokens are:   id  num  ";"  "="  "+"  "-"  "*"  "/"
 */
import java.io.*;

public class Driver
{
  public static void main(String [] args) throws IOException
  {
    Program p = new Program();
    p.scan();

    p.bottomUpParse();
  }
}