import java.io.IOException;

public class A2
{



public static void main(String[] args)                    {
  Simulator sim = new Simulator();

  // syntactically correct program 
  
  try                                                   {
    Code code = sim.parse(
          " { f                 "+
          "      declare x int 5 ;"+
          "      declare y real 6 ;"+
          "     { h"+
          "        declare x real 25 ;"+
          "        declare w real 26 ;"+
          "        print x ;"+
          "        print y ;"+
          "        print w ;"+
          "     }"+
          "     { g"+
          "        declare y real 15 ;"+
          "        declare v real 16 ;"+
          "        call h ;"+
          "        print x ;"+
          "        print y ;"+
          "        print v ;"+
          "     }"+
          "     call g ;"+
          "     call h ;"+
          "     print x ;"+
          "     print y ;"+
          "     }");
      System.out.println(code);
      code.execute();                                     }
  catch(IOException e)                                    {
    System.out.println(e.getMessage());                   }  

  System.out.println("---------------");                  


  // syntactically correct program 
  
  try                                                   {
    Code code = sim.parse(
          " { f                 "+
          "      declare x int 3 ;"+
          "      declare y real 4 ;"+
          "     { g"+
          "        declare x real 5 ;"+
          "        declare z real 6 ;"+
          "        call f ;"+
          "        call g ;"+
          "        print x ;"+
          "        print y ;"+
          "        print z ;"+
          "      }"+
          "      print x ;"+
          "      print y ;"+
          "   }");                                      
    System.out.println(code);
    code.execute();                                     }
  catch(IOException e)                                  {
    System.out.println(e.getMessage());                 }  

  System.out.println("---------------");                  


  // syntactically correct program

  try                                                   {
    Code code = sim.parse(
          " { f                 "+
          "      declare x int 7 ;"+
          "      declare y real 8 ;"+
          "      declare w int 9 ;"+
          "     { g"+
          "        declare x real 17 ; "+
          "        declare z real 18 ;"+
          "        { h"+
          "           declare y int 27 ;"+
          "           declare z real 28 ;"+
          "           print w ;"+
          "           print x ;"+
          "           print y ;"+
          "           print z ;"+
          "        }"+
          "        call h ;"+
          "        print w ;"+
          "        print x ;"+
          "        print y ;"+
          "        print z ;"+
          "      }"+
          "      call g ;"+
          "      print x ;"+
          "      print y ;"+
          "      print w ;"+
          "   }");                                      
    System.out.println(code);
    code.execute();                                     }
  catch(IOException e)                                  {
    System.out.println(e.getMessage());                 }  

  System.out.println("---------------");                  


  // inaccessible variable in g

  try                                                   {
    Code code = sim.parse(
          " { f                 "+
          "      declare x int 5 ;"+
          "      declare y real 6 ;"+
          "     { h"+
          "        declare x real 25 ;"+
          "        declare w real 26 ;"+
          "        print x ;"+
          "        print y ;"+
          "        print w ;"+
          "     }"+
          "     { g"+
          "        declare y real 15 ;"+
          "        declare v real 16 ;"+
          "        call h ;"+
          "        print x ;"+
          "        print y ;"+
          "        print w ;"+
          "     }"+
          "     call g ;"+
          "     call h ;"+
          "     print x ;"+
          "     print y ;"+
          "     }");
      System.out.println(code);
      code.execute();                                     }
  catch(IOException e)                                    {
    System.out.println(e.getMessage());                   }  

  System.out.println("---------------");                  

  // inaccessible function in f

  try                                                   {
    Code code = sim.parse(
          " { f                 "+
          "      declare x int 7 ;"+
          "      declare y real 8 ;"+
          "      declare w int 9 ;"+
          "     { g"+
          "        declare x real 17 ;"+
          "        declare z real 18 ;"+
          "        { h"+
          "           declare y int 27 ;"+
          "           declare z real 28 ;"+
          "           print w ;"+
          "           print x ;"+
          "           print y ;"+
          "           print z ;"+
          "        }"+
          "        call h ;"+
          "        print w ;"+
          "        print x ;"+
          "        print y ;"+
          "        print z ;"+
          "      }"+
          "      call h ;"+
          "      print x ;"+
          "      print y ;"+
          "      print w ;"+
          "   }");                                     
  System.out.println(code);
  code.execute();                                       }
  catch(IOException e)                                  {
    System.out.println(e.getMessage());                 }  


  System.out.println("---------------");

  
  // no initial value for variable in g
  
  try                                                   {
    Code code = sim.parse(
          " { f                 "+
          "      declare x int 5 ;"+
          "      declare y real 6 ;"+
          "     { h"+
          "        declare x real 25 ;"+
          "        declare w real 26 ;"+
          "        print x ;"+
          "        print y ;"+
          "        print w ;"+
          "     }"+
          "     { g"+
          "        declare y real ;"+
          "        declare v real 16 ;"+
          "        call h ;"+
          "        print x ;"+
          "        print y ;"+
          "        print v ;"+
          "     }"+
          "     call g ;"+
          "     call h ;"+
          "     print x ;"+
          "     print y ;"+
          "     }");
      System.out.println(code);
      code.execute();                                     }
  catch(IOException e)                                    {
    System.out.println(e.getMessage());                   }  

  System.out.println("---------------");                  


  // attempt to call a nonfunction 
  
  try                                                   {
    Code code = sim.parse(
          " { f                 "+
          "      declare x int 5 ;"+
          "      declare y real 6 ;"+
          "     { h"+
          "        declare x real 25 ;"+
          "        declare w real 26 ;"+
          "        print x ;"+
          "        print y ;"+
          "        print w ;"+
          "     }"+
          "     { g"+
          "        declare y real 15 ;"+
          "        declare v real 16 ;"+
          "        call h ;"+
          "        print x ;"+
          "        print y ;"+
          "        print v ;"+
          "     }"+
          "     call g ;"+
          "     call x ;"+
          "     print x ;"+
          "     print y ;"+
          "     }");
      System.out.println(code);
      code.execute();                                     }
  catch(IOException e)                                    {
    System.out.println(e.getMessage());                   }  


  System.out.println("---------------");


  // attempt to print a function 
  
  try                                                   {
    Code code = sim.parse(
          " { f                 "+
          "      declare x int 5 ;"+
          "      declare y real 6 ;"+
          "     { h"+
          "        declare x real 25 ;"+
          "        declare w real 26 ;"+
          "        print x ;"+
          "        print y ;"+
          "        print w ;"+
          "     }"+
          "     { g"+
          "        declare y real 15 ;"+
          "        declare v real 16 ;"+
          "        call h ;"+
          "        print x ;"+
          "        print h ;"+
          "        print v ;"+
          "     }"+
          "     call g ;"+
          "     call h ;"+
          "     print x ;"+
          "     print y ;"+
          "     }");
      System.out.println(code);
      code.execute();                                     }
  catch(IOException e)                                    {
    System.out.println(e.getMessage());                   }  


  System.out.println("---------------");


//  analogs to test cases with syntatic errors from Assignment 1
   

  // bad variable 
  try                                                   {
    Code code = sim.parse(
          " { f                 "+
          "      declare x int 1 ;"+
          "      declare y real 1 ;"+
          "     { g"+
          "        declare x real 1 ;"+
          "        declare # real 1 ;"+
          "        call f ;"+
          "        call g ;"+
          "      }"+
          "      print x ;"+
          "   }");                                      
  System.out.println(code);
  code.execute();                                       }
  catch(IOException e)                                  {
    System.out.println(e.getMessage());                 }  

  System.out.println("---------------");                  

  // bad declaration
  try                                                   {
    Code code = sim.parse(
          " { f                 "+
          "      declare x int 1 ;"+
          "      declare y real 1 ;"+
          "     { g"+
          "        declare x real 1 ;"+
          "        declare z 1 ;"+
          "        call f ;"+
          "        call g ;"+
          "      }"+
          "      print x ;"+
          "   }");                                      
  System.out.println(code);
  code.execute();                                       }
  catch(IOException e)                                  {
    System.out.println(e.getMessage());                 }  

  System.out.println("---------------");                  

  // duplicate identifier  
  try                                                   {
    Code code = sim.parse(
          " { f                 "+
          "      declare x int 1 ;"+
          "      declare y real 1 ;"+
          "     { g"+
          "        declare x real 1 ;"+
          "        declare z real 1 ;"+
          "        declare x real 1 ;"+
          "        call f ;"+
          "        call g ;"+
          "      }"+
          "      print x ;"+
          "   }");                                      
  System.out.println(code);
  code.execute();                                       }
  catch(IOException e)                                  {
    System.out.println(e.getMessage());                 }  

  System.out.println("---------------");                  

  // duplicate identifier  
  try                                                   {
    Code code = sim.parse(
          " { f                 "+
          "      declare x int 1 ;"+
          "      declare y real 1 ;"+
          "     { y"+
          "        declare x real 1 ;"+
          "        declare z real 1 ;"+
          "        call f ;"+
          "        call g ;"+
          "      }"+
          "      print x ;"+
          "   }");                                      
  System.out.println(code);
  code.execute();                                       }
  catch(IOException e)                                  {
        System.out.println(e.getMessage());             }  
  

  System.out.println("---------------");                  

  
  // program must begin with left brace
  try                                                   {
        Code code = sim.parse(
            "  f                 "+
	        "      declare x int 1 ;"+
	        "      declare y real 1 ;"+
	        "     { g"+
	        "        declare x real 1 ;"+
	        "        declare z real 1 ;"+
	        "        call f ;"+
	        "        call g ;"+
	        "      }"+
	        "      print x ;"+
	        "   }");                                    
  System.out.println(code);
  code.execute();                                       }
  catch(IOException e)                                  {
    System.out.println(e.getMessage());                 } 
  


  System.out.println("---------------");                  

  // g should not be recognized as a block 

  try                                                   {
    Code code = sim.parse(
            " { f                 "+
	        "      declare x int 1 ;"+
	        "      declare y real 1 ;"+
	        "      g"+
	        "        declare x real 1 ;"+
	        "        declare z real 1 ;"+
	        "        call f ;"+
	        "        call g ;"+
	        "      }"+
	        "      print x ;"+
	        "   }");                                    
  System.out.println(code);
  code.execute();                                       }
  catch(IOException e)                                  {
    System.out.println(e.getMessage());                 } 
  

  System.out.println("---------------");                  

  // bad statement
  try                                                   {
    Code code = sim.parse(
            " { f                 "+
	        "      declare x int 1 ;"+
	        "      declare y real 1 ;"+
	        "     { g"+
	        "        declare x real 1 ;"+
	        "        declare z real 1 ;"+
	        "        call f ;"+
	        "        call g ;"+
	        "      }"+
	        "      << x ;"+
	        "   }");                                    
  System.out.println(code);
  code.execute();                                       }
  catch(IOException e)                                  {
    System.out.println(e.getMessage());                 } 
  

  System.out.println("---------------");                  

  // missing right brace
  try                                                   {
    Code code = sim.parse(
           " { f                 "+
	        "      declare x int 1 ;"+
	        "      declare y real 1 ;"+
	        "     { g"+
	        "        declare x real 1 ;"+
	        "        declare z real 1 ;"+
	        "        call f ;"+
	        "        call g ;"+
	        "      print x ;"+
	        "   }");                                    
  System.out.println(code);
  code.execute();                                       }
  catch(IOException e)                                  {
    System.out.println(e.getMessage());                 } 
  

  System.out.println("---------------");                  

  // program must end with right brace
  try                                                   {
    Code code = sim.parse(
           " { f                 "+
	        "      declare x int 1 ; "+
	        "      declare y real 1 ;"+
	        "     { g"+
	        "        declare x real 1 ;"+
	        "        declare z real 1 ;"+
	        "        call f ;"+
	        "        call g ;"+
	        "      }"+
	        "      print x ;");                         
  System.out.println(code);
  code.execute();                                       }
  catch(IOException e)                                  {
    System.out.println(e.getMessage());                 } 
    

  System.out.println("---------------");                  

  
  // missing semicolon in declaration
  try                                                   {
    Code code = sim.parse(
            " { f                 "+
	        "      declare x int 1 ;"+
	        "      declare y real 1 "+
	        "     { g"+
	        "        declare x real 1 ;"+
	        "        declare z real 1 ;"+
	        "        call f ;"+
	        "        call g ;"+
	        "      }"+
	        "      print x ;"+
	        "   }");                                    
  System.out.println(code);
  code.execute();                                       }
  catch(IOException e)                                  {
    System.out.println(e.getMessage());                 } 
  

  System.out.println("---------------");                  

  
  // missing semicolon in statement
  try                                                   {
    Code code = sim.parse(
           " { f                 "+
	        "      declare x int 1 ;"+
	        "      declare y real 1 ;"+
	        "     { g"+
	        "        declare x real 1 ;"+
	        "        declare z real 1 ;"+
	        "        call f ;"+
	        "        call g "+
	        "      }"+
	        "      print x ;"+
	        "   }");                                    
  System.out.println(code);
  code.execute();                                       }
  catch(IOException e)                                  {
    System.out.println(e.getMessage());                 }


                                                            }


}