Команды SFK


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Команда: calc
sfk calc "1+2*3"

   do a simple calculation with mathematical
   operators + - * /, accepting decimal or
   0x hexadecimal input values.

   options
      -dig[its]=n  round result to n digits
      -form        also print the formula,
                   tab separated after result
      -sum         add values from chain text
      -hex         print result as 0x hex value

   experimental brackets support
      you may add option -bra[ckets] to use formulas
      with brackets, like
         sfk calc -bra 1.0/(1.0-1.0/(3+5)*9)
      however this is an experimental feature.
      wrong calculations may occur with brackets,
      on highly complex formulas. therefore:
      - counter-check the output with an alternate
        calculator before using a command repeatedly.
      - if you really find formulas that calculate
        wrong, supply samples in the sfk forum.

   chaining support
      can use chain input data as #text within formula.

   web reference
      http://stahlworks.com/sfk-calc

   examples
      sfk calc "1.0+2.5*3.5"
        prints 9.75. quotes "" are required
        with linux but not under windows.
      sfk echo "1+2*3" +calc "#text*4"
        calculates 1 + 2*3*4 = 25
      sfk echo "1+2*3" +calc "#text" +calc "#text*4"
        calculates (1+2*3) * 4 = 28
      sfk calc -hex 0xffffffff+0x1
        add two hex values, and show 64-bit hex result
      sfk filt in.txt +calc "#text" -form
        calculate all formulas given in in.txt
      sfk list -size -tabform sfk.exe +filt -utabform "#col1"
       +calc "#text/1000" -dig=0
        show the size of sfk.exe in kbytes, rounded to
        zero digits after decimal point.  [29]
      sfk filt in.csv -utabform "#col2" +calc -sum -dig=2
        if in.csv contains two tab-separated columns like
           apple	1.00
           banana	1.50
           pineapple	2.50
        then add prices from the second column.