program Question4;

#include( "stdlib.hhf" );

static
    a:  int32;
    b:  int32 := 0;
    
    Done:  boolean := false;
    
begin Question4;
    repeat
        mov( false, Done );
        try
            stdout.put( "Please Enter a Number: " );
            stdin.get( a );
            mov( a, eax );
            
            if( eax = 0 ) then
                mov( true, Done );
            elseif( eax <= -1 ) then
                mov( true, Done );                
            else
                add( eax, b );
            endif;
        exception( ex.ConversionError );
            stdout.put( "Illegal numeric value, please re-enter", nl );
        exception( ex.ValueOutOfRange );
            stdout.put( "Value is out of range, please re-enter", nl );
        endtry;
    until( Done );
    
    stdout.put( "The total of entered integers are: ", b, nl );

end Question4;