Here is one possible set of results of the pretty-printing of the
programs in the test data file.

First program
========================================================

program 
    int X, Y, XY;
    begin 
       read X; 
       Y = 0;
       while (X > 0) 
          loop
             read XY; 
             write XY;
             Y = Y + XY; 
             X = X - 1;
           end;
       write Y ;
     end
========================================================



Second program:
========================================================

program 
    int ABC, D;
    begin 
       read ABC; 
       read D;
       while (ABC != D) 
          loop 
             if (ABC > D) 
                then 
                   ABC = ABC - D;
                else 
                   D = D - ABC;
              end;
           end;
        write D;
     end
========================================================


Third program:
========================================================

program 
    int X1, X4; 
    int X2, X3, X7;
    begin 
       X1=0; 
       X2=1; 
       X3=1; 
       read X4;
       while (X1 < X4) 
          loop 
             X7=X2+X3; 
             X2=X3;
             X3=X7; 
             X1=X1+1;
          end;
        write X2;
     end
========================================================

The above is certainly not the only possible form of pretty-printing
but whatever you choose, make sure that the structure of the program is 
clear and obvious from your output.

If you notice problems with the above, please email or post on Piazza.

--Neelam