NAME

       tapecalc - full-screen editing calculator

USAGE

       tapecalc [options] [file-specifications]

SYNOPSIS

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

DESCRIPTION

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

       Tapecalc 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 tapecalc 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.

       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, tapecalc 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><tab><ignored><tab># comment

       The transcripts saved by tapecalc 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 tapecalc.  reads a script  at  the  current
       entry

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

       :f     shows the current script name.

       :r file

       :w file
              writes a script to the specified file.

ENVIRONMENT

       Tapecalc runs in a portable UNIX® environment.

FILES

       Tapecalc  is  a  single binary module, with a help file tapecalc.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 Dickey

SEE ALSO

       wc (1), vi (1)

                                                                                      TAPECALC(1)