MATHCALC(1)

NAME

mathcalc − interface to a TclLib calculator module

SYNOPSIS

mathcalc

DESCRIPTION

Mathcalc reads simple expressions from the standard input, evaluates them, and prints the results on the standard output. It is a command line interface to a TclLib calculator module. It prompts the user (calc%) for each line, and exits on end-of-file or on reading a line containing ‘quit’.

Values are either integer or floating-point constants. A floating-point constant has a decimal point, an exponent, or both. Integer constants are taken as hexadecimal if they start 0x, octal if they start with 0, and otherwise decimal.

Expressions are formed using the following C-like operators and predefined functions, shown in order of decreasing priority:

- + ! ~
unary: negate, plus (no-op); logical not and one’s complement (integers only)

∗ / %
multiply and divide, integer remainder

+ - add, subtract

<< >>
left shift, right shift (integers only)

< <= >= >
relational operators

== !=
equality, inequality

& bit-wise and (integer only)

^ bit-wise exclusive-OR (integer only)

| bit-wise or (integer only)

&& logical and

|| logical or

a?b:c conditional: if a is non-zero, the result is b, otherwise c

Mathcalc provides the following mathematical functions:

abs    ceil   fmod   sin
acos   cos    hypot sinh
asin   cosh   log    sqrt
atan   exp    log10 tan
atan2 floor pow    tanh

See math-elem(2) for the usual definitions.

SOURCE

/appl/cmd/mathcalc.b
/appl/lib/tcl_calc.b

DIAGNOSTICS

ARRG! bad constant syntax

Error! bad expression syntax, or any other error