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Diffstat (limited to 'man/1/mc')
| -rw-r--r-- | man/1/mc | 286 |
1 files changed, 27 insertions, 259 deletions
@@ -1,272 +1,40 @@ .TH MC 1 .SH NAME -mc \- interactive floating point mathematics calculator +mc \- multicolumn print .SH SYNOPSIS .B mc [ -.B -s -] [ -.I file +.BI -c " columns" ] -.PP -.B mc [ -.B -s -] [ -.I expression +.I file ... ] .SH DESCRIPTION .I Mc -interprets a simple language for floating point arithmetic -with limbo-like syntax and -functions. -.PP -If no -.I file -or -.I expression -is given -.I mc -interprets the standard input. -.PP -.I Mc -input consists of -.I expressions -and -.IR statements . -Expressions are evaluated and their results printed. -Statements, typically assignments and function -definitions, produce no output unless they explicitly call -.IR print . -.PP -Comments begin with # and extend to the end of the line as in limbo. -.PP -Numbers may have a base specified using C or limbo syntax. -.PP -Variable names have the usual syntax, including -.LR _ . -They may be introduced without a declaration and have an initial default value -of 0.0. -.PP -The predefined variable -.B degrees -can be set to specify angles in degrees rather than radians in the trigonometric functions below. It is initially 0 (angles in radians by default). -.PP -The predefined variable -.B printbase -can be set to any integer between 2 and 36 inclusive to specify -the base of all values output. -.PP -The constants -.BR e , -.BR Pi (π) , -.BR Phi (φ) , -.BR Gamma (γ) , -.BR Infinity (∞) , -and -.BR Nan (NaN) -are predefined. -.PP -Expressions are formed with these limbo-like operators, listed by -decreasing precedence. -.TP -.B ! ~ + - ++ -- -.TP -.B ** -.TP -.B * / % // -.TP -.B + - -.TP -.B << >> -.TP -.B > >= < <= <-> -.TP -.B == != -> <- -.TP -.BR & " " " " ↑ -.TP -.B ^ -.TP -.BR | " " " " ↓ -.TP -.B && -.TP -.B || -.TP -.B ? : -.TP -.B = := += -= *= /= %= //= &= ^= |= <<= >>= -.TP -.B , -.PP -If the -.B -s -flag is given, a strict interpretation of the declaration rules are enforced - all variables must be declared and initialized first using the -.B := -operator. Otherwise undeclared variables are declared and initialized to 0.0 in the -current scope. In either case, -.B := -always forces a new declaration. -.PP -The extra non-limbo operators are factorial (! when postfix), integer division (//), -conditional (? and :) comma (,), logical equivalence (<->), implication (->), reverse implication (<-), nand (↑) and nor (↓). -.PP -Unary operators, assignment operators, **, ? and : are right associative as usual. -.PP -The comma operator may be replaced by white space in expressions. -.PP -Built in functions are -.BR abs , -.BR acos , -.BR acosh , -.BR asin , -.BR asinh , -.BR atan , -.BR atanh , -.BR atan2 , -.BR cbrt , -.BR ceiling , -.BR cos , -.BR cosh , -.BR erf , -.BR exp , -.BR floor , -.BR frac , -.BR gamma (Γ) , -.BR int , -.BR log , -.BR log10 , -.BR max , -.BR min , -.BR pow , -.BR rand , -.BR round , -.BR sign , -.BR sin , -.BR sinh , -.BR sqrt , -.BR tan , -and -.BR tanh . -.PP -Functions of one argument may be written without brackets: -.sp -.EX - sin 45 - sqrt 2 -.EE -.sp -These behave as unary operators with the highest precedence. -.PP -Sum and product operators are available using sigma (Σ) and pi (Π). -For example -.sp -.EX - sigma(i = 0, 100, 1/i!) -.EE -.sp -gives the value 2.7182818284590455 . -.PP -Simple definite integration can be done :- -.sp -.EX - integral(x = -1.96, 1.96, exp(-0.5*x*x)/sqrt(2*Pi)) -.EE -.sp -outputs 0.9500042096998785 . -∫ may be used in place of integral. -.PP -For the sake of completeness, the derivative of a function at a given -point can be calculated :- -.sp -.EX - differential(x=1, x*x+5*x+6) -.EE -.sp -gives 7. -Δ may be used in place of differential. -.PP -There is limited support for the solution of equations. -For example -.sp -.EX - solve(x**2-5*x+6==0) -.EE -.sp -outputs the values 2 and 3. The value returned by -.B solve -is the largest of the roots. To specify the variable to solve for, if -ambiguous, simply add it as a second parameter as in, for example, -.sp -.EX - solve(x**2-5*x+6==y**3+z, x) -.EE -.sp -This will substitute the current values of -.B y -and -.B z -and solve for -.B x. -To tune the solution process, the predefined variables -.B solvelimit -(default value 100) and -.B solvestep -(default value 1) are available. -The former specifies the maximum absolute solution -to search for. The latter -specifies the interval increment to apply when searching -for sign changes. -.PP -.B Print -prints a list of expressions that may include -string constants such as -\fL"hello\en"\f1.\fP -.PP -.B Read -reads in a list of values interactively. The list of variables to assign -these values should follow. -.PP -Other files may be read in using the limbo include statement. -.PP -Control flow statements are -.BR break , -.BR continue , -.BR exit , -.BR return , -.BR if - else , -.BR while , -.BR do - while , -and -.BR for , -with braces for grouping. -.PP -The use of semi-colon and newline is optional. -.PP -Functions are introduced by the keyword -.BR fn . -.SH EXAMPLE -.EX -fn ack(a, b) -{ - n = n+1 - if(a == 0) - return b+1; - if(b == 0) - return ack(a-1, 1); - return ack(a-1, ack(a, b-1)); -} - -for(i = 0; i < 4; i++) - for(j = 0; j < 4; j++){ - n = 0 - print "ack(", i, ",", j, ")=", ack(i, j), "\n" - print n, " calls", "\n" - } -.EE +formats the contents of +.I files +(standard input by default) into columns. +.I Columns +is an integer specifying the number of +character widths into which +.IR mc 's +output is formatted. +If run in an +.IR acme (1) +window, the default +.I columns +is the number of zeros that will fit across the window; +otherwise the default +.I columns +is 65. .SH SOURCE .B /appl/cmd/mc.b .SH "SEE ALSO" -.IR fc (1), -.IR math (2) +.IR acme (1) +.SH BUGS +The columns are not aligned properly +if the input contains tabs. +.br +The output doesn't fit the width of a +.IR wm-sh (1) +window by default. |