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Macro \opexport allow to export a number in a macro. It’s an extrato version 0.23 which is very usefull to exchange datas between xlop andthe outside world. The first argument is a number in the xlop sense, that is,either a number write with figures, or a variable name. The number is translatedin a form directly acceptable for TEX and hold in the second argumentwhich should be a macro name. However, note that decimal separator willbe the one specified bydecimalsepsymbol (without its possible braces).source\opmul*{5}{3.141592654}{F}macro:>15.70796327 \opexport{F}{\fivepi}\texttt{\meaning\fivepi}We can use this macro to typeset numbers calculated by xlop in an arraywith a decimal alignment, or to initialize a counter or a length (don’t forgetthe unit in the last case).4.3 Figures of NumbersMacros \opwidth, \opintegerwidth, and \opdecimalwidth indicate numberof digits of the whole number, of its integer part, of its decimal part respectively.The first argument is the examined number and the second oneindicates the variable where result will be record.123456.1234 is writtenwith 10 figures (6 in theinteger part and 4 in thedecimal part).source\opcopy{123456.1234}{a}%\opwidth{a}{na}%\opintegerwidth{a}{ia}%\opdecimalwidth{a}{da}%\opprint{a} is written with\opprint{na} figures (\opprint{ia} inthe integer part and \opprint{da} inthe decimal part).Macro \opunzero delete all the non-significant zeros of the numberpassed as argument.Before : 00150.00250After : 150.0025source\opcopy{00150.00250}{a}%Before : \opprint{a}\par\opunzero{a}%After : \opprint{a}Macros \integer and \opdecimal give the integer part and the decimalpart of a number respectively. First argument is the number to process,and the second one is the variable name which hold the result.Integer part: 37Decimal part: 69911source\opcopy{37.69911}{a}%\opinteger{a}{ia}%\opdecimal{a}{da}%Integer part: \opprint{ia}\parDecimal part: \opprint{da}25
Six macros allow to write or read a figure of a number. You can read orread a figure according to its place in the whole number, or in the integerpart, or in the decimal part. Figures for whole number and for decimal partare numbered from right to left, figures for integer part are numbered fromleft to right. For instance, with the number 1234.56789, the second figureis 8, the second figure of the integer part is 3, and the second figure of thedecimal part is 6. It is now easy to guess the rôle of the six next macros:• opgetdigit ;• opsetdigit ;• opgetintegerdigit ;• opsetintegerdigit ;• opgetdecimaldigit ;• opsetdecimaldigit ;Syntax is the same for these macros. The first argument is the processednumber (reading or writting), the second one is the index of te figure, andthe third one is the variable name which hold the result (figure read orchanged number). If index is out of the range, the reading macros give 0as result and writing macros extend the number in order to reach this index(for that, zero will be created in new slots).4.4 ComparisonsWhen you want complex macros, often you need to realize tests. For that,xlop gives the macro \opcmp. The two arguments are numbers and thismacro setup the tests \ifopgt, \ifopge, \ifople, \ifoplt, \ifopeq, and\ifopneq to indicate that first operand is greater, greater or equal, less orequal, less, equal, or different to the second operand respectively.For technical reasons, xlop give global definitions for the six tests above.Then, they are not protected by groups. Since these tests are used by manyxlop macros, you must always use tests\ifop... immediately after \opcmp,or, at least, before any use of a xlop macro. Otherwise, there will be bugshard to fix!Let’s resume the hour display macro see at section 4.2. But now, wecheck if argument is between 0 (include) and 1440 (exclude), then we processtests in order to know if “hour” is plural or not, as for “minute”.\newcommand\hour[1]{%\opcmp{#1}{0}\ifopge\opcmp{#1}{1440}\ifoplt\opidiv*{#1}{60}{h}{m}%\opprint{h} hour%source26
Page 1 and 2: XLOP v 0.25User ManualJean-Côme Ch
Page 3: C Future Versions 46D Index 48ii
Page 7 and 8: Chapter 2xlop InstructionsExcept so
Page 9 and 10: to use the \opset macro. For exampl
Page 11 and 12: −12+−23=−35(−12)+(−23)=(
Page 13 and 14: This mechanism is even more powerfu
Page 15 and 16: Chapter 3Arithmetic Operations3.1 A
Page 17 and 18: −245−72=−317source\opsub[styl
Page 19 and 20: 4 5 3×1 0 0 1 2 0 52 2 6 59 0 6 ·
Page 21 and 22: 3.4.1 End ControlIn the following t
Page 23 and 24: 150÷7=21.428571...source\opdiv[per
Page 25 and 26: 0×0 3.4 5 68 9 61 2 8 002×5 60.0
Page 27: It is 13 hours 55 minutessource\opi
Page 31 and 32: directly these “operations” sin
Page 33 and 34: The very last macro we have to stud
Page 35 and 36: Appendix AShort SummaryA.1 Compilat
Page 37 and 38: A.2 Macros ListMacroDescription\opa
Page 39 and 40: Macro\opsub*{n1}{n2}{N}\opunzero{N}
Page 41 and 42: Parameter Default Significationcarr
Page 43 and 44: Appendix BTricksB.1 xlop vs. calc a
Page 45 and 46: }\againtrue\global\primetrue\tryind
Page 47 and 48: prohibition, there is the particula
Page 49 and 50: Appendix CFuture VersionsVersion of
Page 51 and 52: Appendix DIndexaddsymbol, 6afterper
Page 53: nil, 44offsetcarry, 14opcolumnwidth

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