home *** CD-ROM | disk | FTP | other *** search
- CALC100 version 1.2
-
- CALC100 is a 100 digit calculator program. It can do
- arithmetic, Fortran-style algebraic syntax, and various
- built-in mathematical functions. Its fast floating
- point arithmetic takes advantage of the computer's unsigned
- integer multiply and divide instructions. Division uses
- a Newton-Raphson iteration, which is much faster than
- the shift-and-subtract approach.
-
- Algebraic expressions are entered in the same syntax as
- Fortran or other high level language statements. Multiple
- statements can be entered on the same line but must be separated
- by semicolons. Thus the entry 'x=2; y=x+4' sets the variables
- x and y as indicated and also displays the numeric results.
- There are 7 algebraic variables named t, u, v, w, x, y, and z.
- The constant pi is also represented as a variable.
-
- All of calc100's commands have the syntax of C language
- functions. For example, to display the logarithm of 2, you may
- enter the command 'log(2)' followed by a carriage return. The
- parentheses may be omitted if there is no ambiguity; thus 'log 2'
- gives the same result.
-
- acos Radian inverse circular cosine
- acosh Inverse hyperbolic cosine
- asin Radian inverse circular sine
- asinh Inverse hyperbolic sine
- atan Radian inverse circular tangent
- atanh Inverse hyperbolic tangent
- bits Display floating point number as array of integers
- cbrt Cube root
- cos Circular radian cosine
- cosh Hyperbolic cosine
- cot Circular radian cotangent
- digits N Set number of digits in the numeric display to N
- dm Define macro command (see text below)
- em N Execute macro N times
- exit Terminate program - use at end of command files
- exp Base e exponential function
- fac Factorial of integer argument
- gamma Gamma function (accuracy >= 55 decimals)
- h or help Display list of commands
- hex Display integer argument in radix 8, 10, and 16
- jv(v,x) Bessel function Jv(x) (accuracy about 40 decimals)
- log Natural logarithm
- pow(x,y) exp( y log x ) = x raised to the yth power
- save filename Save session in file 'filename'
- or in 'calc.sav' if no file name given
- sin Circular radian sine
- sinh Hyperbolic sine
- sqrt Square root
- system command Execute operating system 'command' and return
- take filename Read commands from indicated disc file
- tan Circular radian tangent
- tanh Hyperbolic tangent
- tm Type (display) currently defined macro command
- yn(n,x) Bessel function Yn(x) (accuracy about 40 decimals)
-
- To define a macro expression, enter 'dm' and type the
- expression on the next line. The expression must fit on
- one line, but multiple statements can be entered if they
- are separated by a semicolon (;). Execute the defined
- macro N times by the command 'em N'. Display the current
- macro definition by 'tm'. Example:
-
- x=y=v=z=1
- dm
- z=z*x/v; v=v+1; y=y+z
- em 10
-
- is a power series for exp(1). You can put the above into
- an ASCII file named, say, sample.tak and execute the program
- from the file by the command 'take sample.tak'.
-
- You can also redirect input or output, for example: 'calc
- <sample.tak >answer.dat'. But in that case there shoud be an
- 'exit' command at the end of the input file.
-
- The 'system' command passes the rest of the command line
- to the computer's operating system to execute as a command.
- After the command has finished executing, control will return
- to the calc100 program.
-
- The 'save' command starts logging most of what appears
- on the screen into a disc file. Certain error printouts and
- the help menus will not be written into the file. A repeated
- invocation of 'save' closes the old save file and opens a new one
- (or possibly the same one if the file name argument is the same).
- Printout generated by a 'system' command will not go into the
- save file, but it probably will go into a file that was created by
- redirecting the standard output as in 'calc <sample.tak >answer.dat'.
-
- The rigorous way of calling a function is to put the
- argument in parentheses. However if no expression decoding
- is implied, the parentheses can be omitted. For example
- 2 + sin x means 2 + sin(x), but sin x + 2 means sin(x) + 2.
- If a function has more than one argument, the parentheses
- must be there. For example pow(2,3) is 8, but pow 2,3 is
- an error.
-
- By default, the numeric display gives 70 digits after the
- decimal point. This may be varied from N = 1 to 99 digits by
- the command 'digits N'.
-
- -- Steve Moshier
- September, 1988
-