tapecalc - full-screen editing calculator

       Thomas E. Dickey

       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.

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).

Tapecalc runs in a portable UNIX® environment.

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

tapecalc - full-screen editing calculator

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/cursormovement: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><blank><ignored><blank># 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.

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

       :f     shows the current script name.

       :rfile
              reads a script at the current entry

       :wfile
              writes a script to the specified file.

       Command line options of tapecalc are:

       -h     Prints the list of options.

       -iinterval
              Sets compounding interval for interest computation.

       -oscript
              Specify file in which to save output transcript.

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

wc(1), vi(1)

                                                   2024-01-10                                        TAPECALC(1)

tapecalc[options][file-specifications]