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add(1)                                                                  add(1)




NAME

       add - full-screen editing calculator


USAGE

       add [options] [file-specifications]


SYNOPSIS

       Add  is a fixed-point calculator that operates as a full-screen editor.


DESCRIPTION

       Add performs fixed-point computation.  It is  designed  for  use  as  a
       checkbook or expense-account balancing tool.

       Add  maintains  a running result for each operation.  You may scroll to
       any position in the expression list and modify the list.  Enter data by
       typing numbers (with optional decimal point), separated by operators.

       An  output  transcript  may  be saved and reloaded for further editing.
       Scripts are loaded from left to  right  (with  the  "output"  processed
       first).


OPTIONS

       Command line options of add are:

       -h     Prints the list of options.

       -i interval
              Sets compounding interval for interest computation.

       -o script
              Specify file in which to save output transcript.

       -p num Sets precision (number of digits after the decimal place).


OPERATIONS

   Computations:
       The operators are all single-character:

       +      begins an addition

       -      begins a subtraction

       ~      negates the result

       *      begins a multiplication

       /      begins a division

       %      begins an interest computation (uses interval): rate=number.

       $      begins a sales-tax computation: rate=number.

       (      opening  parenthesis.   This  may  enclose  a  unary  '-',  more
              parentheses, or data (implicit unary '+').

       )      closing parenthesis, expects another operator, not data.

       =      flushes out the current number,  forces  re-computation  of  the
              running result.

       w      increases  the  width  used  for  numbers  by one column up to a
              platform-specific value.

       W      decreases the width used for numbers by one column,  down  to  a
              minimum of 6.

       A space flushes out the current number-input, and (by default) sets the
       next operator to be the same as the current one.  You  may  repeat  the
       last arithmetic operation of any type:

       a      repeats the last '+' (default 0).

       s      repeats the last '-' (default 0).

       n      repeats the last '~'.

       m      repeats the last '*' (default 1).

       d      repeats the last '/' (default 1).

       i      repeats the last '%' (default 4).

       t      repeats the last '$' (default 4).

       You  may  toggle  the  prefix operator of any number by typing a single
       character:

       A      toggles the operator to '+'.

       S      toggles the operator to '-'.

       N      toggles the operator to '~'.

       M      toggles the operator to '*'.

       D      toggles the operator to '/'.

       I      toggles the operator to '%'.

       T      toggles the operator to '$'.

   Editing:
       As you enter data, you may edit it.  A backspace deletes the last digit
       of  the  current  number (if it is visible).  Use the arrow keys or vi-
       style 'h' and 'l' to move  left  and  right  within  the  line.   Other
       editing commands include

       u      undoes the last x/X command (restricted to restoring the current
              data only).

       x      deletes the current data.  If the  data  is  null,  deletes  the
              following line.

       X      deletes  the  current  data.   If  the data is null, deletes the
              preceding line and moves up.

       o      opens a new line after the current line.

       O      opens a new line before the current line.

       #      edit the associated comment.

       An "open" permits you to insert  a  new  operator  and  data  into  the
       expression  list.   You may type an operator character (e.g., '+'), and
       continue with the new data, or  an  operator-repeat  (e.g.,  'A').   In
       either case, you may edit the new data, just as you would the old data.
       A 'u' (or other toggle, such as 'o', 'O', or 'q') typed after  an  open
       will undo the open (and close it).

   Scrolling/cursor movement:
       H      move to the top line on the screen.

       M      move to the middle line on the screen.

       L      move to the last line on the screen

       CTL/F  scroll forward one screen.

       CTL/B  scroll backward one screen.

       j      move forward one line.

       k      move backward one line.

       z<CR>  move the current line to the top of the screen.

       z.     move the current line to the middle of the screen.

       z-     move the current line to the bottom of the screen.

       Like vi, add allows you to jump to a particular line with a ":" command

       :$     jumps to the last entry

       :1     jumps to the first entry.

   Scripts:
       Transcript files are formatted to permit line-oriented entries:

              <operator><value><blank><ignored><blank># comment

       The transcripts  saved  by  add  contain  the  running  result  in  the
       "ignored"  part.   To  exit  without  saving a transcript, type 'Q'.  A
       normal exit, by typing 'q', saves the  list  of  operators,  data  (and
       running result) in the specified file.

       You can read and write scripts without leaving add.

       :e file
              clears the current script and reads a script from the file.

       :f     shows the current script name.

       :r file
              reads a script at the current entry

       :w file
              writes a script to the specified file.


ENVIRONMENT

       Add runs in a portable UNIX(R) environment.


FILES

       Add  is  a  single binary module, with a help file add.hlp installed in
       the same directory.


FUTURE WORK

       It would be nice to be able to change the precision within the program.
       In  particular,  the  interest and sales tax computations would be more
       useful if their precision was independent of the running total.


AUTHOR

       Thomas E. Dickey


SEE ALSO

       wc(1), vi(1)



                                                                        add(1)

add 20180701 - Generated Sat Feb 16 09:24:27 CST 2019
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