/************************** I2ICE TUTORIAL SCREEN #36 **************************/
menu=1
define literally P   = 'include scr.35 nolist'
define literally R   = 'include scr.36 nolist'
define literally RTN = 'include scr.36 nolist'
define literally N   = 'include scr.37 nolist'
define literally M   = 'include scr.2 nolist'
cls
/*******************************************************************************/
'                                                     ------------------------'
'Let''s see how these specifications for breaking     | SCR36: BREAK AT "a"    |'
'emulation can help us locate the bug that writes    | M = Go to main menu    |'
'lowercase letters after the amount of change.       | N = Next screen        |'
'                                                    | P = Previous screen    |'
'We need to find how the letters "a" and "b" get     | Q = Quit tutorial      |'
'into the output data stream.  One way to begin a    | R = Rewrite SCR36      |'
'search for the bug is to break emulation when "a"   | SCR# = Screen desired  |'
'occurs after 1 in the output: "1a quarter".  Then    ------------------------'
'we can identify the source of the "a" by examining  '
'the variables involved in generating the output stream.'
' '
'We have various options for specifying the breakpoint.   We could use a break'
'specification to break at line 14, which is the line that sends ASCII code to'
'the output port.'
' '
'This is not a good choice, because our program would stop each time line 14'
'was executed (each time a character was output).  We only want to break when'
'"a" is output.  Let''s use a system specification to break when a data value'
'("a") is output. '
'------------------------------------------------------------------------------'