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CCCCCCC MM MM A TTTTTTTTTT HH HH CC MMM MMM AAA TT HH HH CCC MMMM MMMM AA AA TT HH HH CCC MM MM MM MM AA AA TT HHHHHHHHHH CCC MM MM MM MM AAAAAAAAA TT HH HH CC MM MMM MM AA AA TT HH HH CCCCCCC MM M MM AA AA TT HH HH CMATH 1.5 Dr. Martin Sander Software Development Sertürnerstr. 11 D-37085 Göttingen Germany e-mail: MartinSander@Bigfoot.com http://www.optivec.com For the commercial version, please order by e-mail or through our web-site! See chapter 1.3 for details. ***************************************************************************** !! This is an ASCII text file! It is best viewed with a simple !! !! DOS editor. !! !! If you load this file into a word processor under Windows, you !! !! must use the filter "DOS text". !! !! Alternatively, you may use FCONVERT (shipped with Borland C++) to !! !! convert from ASCII (OEM) into the ANSI character set. !! !! preferably use the lettertype CourierNew 10 pt. !! ************************************** German-speaking users: Um die Kosten für das Herunterladen der Shareware-Version über das Internet für alle so gering wie möglich zu halten, enthält diese nur die englische Dokumentation. Sie finden die deutsche Beschreibung separat unter http://www.gwdg.de/~msander/Download/BC/CMDOCD.ZIP ************************************** OptiCode (TM) and OptiVec (TM) are trademarks of Dr. Martin Sander Software Dev. Other brand and product names mentioned in this handbook for identification purposes are trademarks or registered trademarks of their respective holders. **************************************************************************** * * ******* Contents ******* * * **************************************************************************** 1. Introduction 1.1 What is CMATH ? 1.2 Licence Terms 1.3 Registered Versions 2. Getting Started 2.1 Installation 2.2 De-Installation 3. Overview over the Functions of CMATH 3.1 Initialization of Complex Numbers 3.2 Data-Type Interconversions 3.3 Basic Complex Operations 3.4 Arithmetic Operations 3.5 Mathematical Functions 4. Error Handling 4.1 General Error Handling of Complex Functions 4.2 Advanced Error Handling: Writing Messages into a File 5. Syntax Reference 5.1 C++ Version 5.2 Plain-C Version **************************************************************************** * * ******* 1. Introduction ******* * * ***************************************************************************** 1.1 What is CMATH ? ------------------- CMATH is a comprehensive library for complex-number arithmetis and mathematics. It is primarily intended as a high-quality replacement for the C++ complex class libraries presently available. In addition, all functions may be called from C, without the necessity to use C++. Superior speed, accuracy and safety are achieved through the implementation in Assembly language (as opposed to the compiled or inline C++ code of the complex class libraries). Only for the most simple tasks, alternative inline C++ functions are used. The implementation was guided by the following rules: 1. Without any compromise, top priority is always given to the mathema- tically correct result, with the accuracy demanded for the respective data type. Especially for complex functions, this necessitates a very thorough treatment of many different situations. To this end, the various cases have to be distinguished with pedantic care. 2. Mathematical functions must be "safe" under all circumstances. They may for no reason simply crash, but have to perform a decent error treatment. This is true even - and perhaps especially - for seemingly nonsense arguments, with the single exception of the non-numbers INF and NAN, which occur themselves only as a result of serious errors in other functions. 3. By all possible means, greatest execution speed must be attained. (After all, you did not buy your fast computer for nothing!) 4. The program code has to be as compact as possible. However, in case of conflicts, faster execution speed is always given priority over smaller code size. Having a look into the complex class libraries shipped with popular compilers, you will immediately discover the differences between our approach and theirs. Often the mathematical functions are implemented by simply writing down the textbook formula. This yields relatively compact source code. But, due to round-off error of intermediate results, the final results returned by these functions are sometimes very inaccurate or even completely wrong. Moreover, they may lead to unhandled floating-point errors (this means: program crash!). Unnecessary to mention that the code thus generated is rather slow. For programmers who prefer classis C-style functions over C++, CMATH provides all complex-number operations and functions also for the language C. This is accomplished through an additional set of alternative declarations of the complex types as structs in place of classes. CMATH versions for Pascal and Delphi are also available. As far as possible, all functions have the same names in the Pascal/Delphi version as in the C version. The C++ classes and the C structs are binary compatible with each other. This point may become important for large projects with mixed C and C++ modules. Existing Borland C++ code which uses the complex class library contained in <complex.h> can be left unchanged, because the CMATH functions and data types are also binary compatible with those of <complex.h>. Here is a detailed description of how to switch from the complex classes of Borland C++ to the new implementation given by CMATH: * In C++ modules, replace the statement #include <complex.h> by the statement #include <newcplx.h> Then, the following three complex classes are defined: class complex<float>, class complex<double>, and class complex<extended>. The data types fComplex, dComplex, and eComplex are defined as synonyms for these classes. In order to avoid the letter "L" (which is already over-used by "long int" and "unsigned long" in the language C), the type "extended" is used here as a synonym for "long double". Consequently, the complex data type consisting of long doubles is named "eComplex". Thereby, the way is held open for a future inclusion of whole- number complex types into CMATH. Then,"liComplex" and "ulComplex" will denote the complex types consisting of "long int" or "unsigned long" parts, respectively. * If you prefer to have the "classic" class complex of older releases of Borland C++, you have to declare #define CMATH_CLASSIC_COMPLEX before (!) including <newcplx.h>. In this case, only the class complex will be defined and gets the synonym dComplex. Here you will have no access to the complex-number functions of float and of extended precision. * For C modules, you cannot include <nexcplx.h>. Rather, please declare #include <cmath.h> If you are using only one level of floating-point precision, you may wish to include only one of the type-specific include-files: <cfmath.h>, <cdmath.h>, or <cemath.h>, respectively. The plain-C implementation of CMATH is based upon the following definitions of the three complex data types: typedef struct { float Re, Im; } fComplex; typedef struct { double Re, Im; } dComplex; typedef struct { extended Re, Im; } eComplex; As described above, the data type "extended" is used as a synonym for "long double". * In the C++ classes, the real and imaginary parts are declared as public (in contrast to Borland C++ !) and named "Re" and "Im", respectively. This allows to access them as "z.Re" and "z.Im" in C++ modules as well as in C modules. This documentation describes the OptiVec implementations for - Borland C++ (Version 3.0 or higher, incl. Borland C++ Builder) for DOS and Microsoft Windows 3.0 or later (or Win-OS sessions under IBM OS/2 2.0 or later; in the following, we will simply speak of "Windows"). The library for the memory model FLAT for Windows95/98 and WindowsNT requires Borland C++, version 4.0 or higher. - Microsoft Visual C++ (Version 5.0 or higher) for Windows95/98/NT on PC platforms. - Powersoft Optima++ (Version 1.5 or higher) for Windows95/98/NT on PC platforms. Please note that only the documentation is valid for these different compilers. The libraries themselves are compiler-specific; each library can be used only with one compiler and, in the case of Borland C++, with one memory model. Borland C++ only: ----------------- Depending on your choice when ordering or downloading the Shareware version, you have got either of the following three library versions: memory model FLAT for Windows95/NT, LARGE for DOS, or LARGE for Windows 3.x. All of them require, at least, a 386 computer equipped with a 387 coprocessor. This means: no emulation, no 486SX, but preferably 486DX, Pentium or higher. The full (registered) version contains libraries for all memory models of DOS, 16-bit Windows and 32-bit Windows. These libraries, in turn, are shipped in three versions: one for 486DX and Pentium computers, the second for 386 with 387, the third for 286 with or without coprocessor, i.e. with emulation. Microsoft Visual C++ only: -------------------------- The Shareware version is for "single-thread debug" and for "multi-thread debug". The full (registered) version for Microsoft Visual C++ contains additional libraries for "multi-thread DLL", single-thread and multi-thread release. Versions for other C compilers are in preparation. 1.2 Licence Terms ----------------- This is the English Shareware version of CMATH ("SOFTWARE"). It may be used under the following licence terms: 1. You may test the SOFTWARE free of charge for an unlimited period of time. This testing phase ends when you permanently integrate functions of this SOFTWARE into any of your applications (programs, program parts...). 2. If you want to use this SOFTWARE for commercial purposes, you have to purchase the registered version (see chapter 1.3). 3. Use of this SOFTWARE for educational purposes at schools and universities remains free of charge. However, if any application created under these terms is sold to others or otherwise used for commercial purposes, paragraph 2 applies. 4. Distributing this SOFTWARE to others is allowed only in one of the following two ways: a) linked into your programs, so that the parts stemming from this SOFTWARE do no longer appear as a library. b) as a whole in unchanged form (in particular the Copyright and Licence statements!), whereby you may ask a fee only and exclusively for the physical act of copying the SOFTWARE. 5. This SOFTWARE is provided on an "as is" basis. Any explicit or implicit warranties for the SOFTWARE are excluded. Despite thorough testing of the SOFTWARE, errors and bugs cannot be excluded with certainty. No claims as to merchantability or fitness for a particular purpose are made. You may not use the SOFTWARE in any environment or situation where personal injury or excessive damage to anyone's property (including your own) could arise from malfunctioning of the SOFTWARE. Copyright for the SOFTWARE and its documentation (C) 1996-1999 Martin Sander All rights reserved, including those of translation into foreign languages. Address of the author: Dr. Martin Sander Software Development Sertürnerstr. 11 D-37085 Göttingen Germany e-mail: MartinSander@Bigfoot.com 1.3 Registered Versions ----------------------- In order to make this product affordable also for those who will not themselves make money using it, we offer an "educational edition" at a strongly reduced rate, in addition to the full "commercial edition". The contents of these two editions is identical. The only difference lies in the restrictions of use: The "educational edition" may not be used for commercial / business / government purposes, but is restricted to private and educational use. Purchasing the full (registered) version gives you the right to use it on as many computers at a time as the number of units you bought. Corporate site and world-wide licences are available upon request. The full version (both the commercial and the educational editions) of CMATH for Borland C++ and of CMATH for Microsoft Visual C++ - support all memory models of Windows95/98, NT, 3.x, and DOS (Borland C++) or "single-thread", "multi-thread", "multi-thread DLL", both debug and release (Microsoft Visual C++) - (Borland C++ only: ) have individually optimized libraries for each degree of processor backward-compatibility: 486DX/Pentium+ (optimized for Pentium/PentiumPro) 386+ (387 coprocessor required) 286+ (no coprocessor required). - come with printed documentation. - entitle you to two free updates. - can be ordered at the following conditions: a) if you can pay in German Marks (from 1999 on: in Euro) and order directly from the author, the price is DM 59,- for 1 unit of the educational edition DM 99,- for 1 unit of the commercial edition, DM 350,- for 5 units, DM 600,- for 10 units (incl. 16% VAT, plus DM 10,- handling charge). Please order by sending an e-mail to MartinSander@bigfoot.com or use a print-out of the file ORDER.TXT. Payment options: - pre-paid by DM Eurocheque - C.O.D. (Cash-On-Delivery) - upon invoice (only within Germany, net 14 days) If you have a European VAT ID, or if you order from outside the European Union, you are exempt from the German VAT, but you may have to pay your local VAT and/or import duties according to local laws. b) International credit card or US-$ cheque payment is possible by ordering through the following web-sites (currently available only for CMATH for Borland C++): Atlantic Coast's SoftShop: http://www.soft-shop.com/cgi-bin/order.html?136 (this is the SoftShop sales page for all our products; please be sure to choose the right one from the menu) $ 39 for 1 unit of the educational edition $ 60 for 1 unit of the commercial edition, $200 for 5 units, $350 for 10 units Add $5 for shipping&handling and applicable VAT. ShareIt: CMATH for Borland C++: http://www.shareit.com/programs/101353.htm CMATH for Microsoft Visual C++: http://www.shareit.com/programs/103422.htm $ 44 per unit of the educational edition (including S&H) $ 65 per unit of the commercial edition (including S&H). Add applicable VAT. You may also order by e-mail to register@shareit.com. US customers can also call 1-800-903-4152 (only for orders, please). US check and cash orders can be sent to ShareIt!'s US office at ShareIt! Inc. P.O. Box 97841 Pittsburgh, PA 15227-0241 USA * When ordering by e-mail, phone, or postal mail through ShareIt, * * please have the program number ready: * * CMATH for Borland C++: No. 101353 * * dto., educational: No. 102655 * * CMATH for MSVC: No. 103422 * * dto., educational: No. 103441 * **************************************************************************** * * ******* 2. Getting Started ******* * * **************************************************************************** 2.1 Installation ---------------- If you got CMATH as a part of OptiVec (a comprehensive library of vectorized functions by the same author), CMATH is automatically installed when you install OptiVec itself. In this case, installation of CMATH is already included and you should skip this chapter to continue with chapter 3. Otherwise, please note the following points: 1. In order to use CMATH, you need an already installed copy of your C/C++ compiler. Install CMATH by executing INSTALL.EXE on the installation disk. 2. Add the installation directory (which you chose during installation) to the library search path and to the include-file search path of the IDE and of the configuration file TURBOC.CFG, in case you are using the command-line compiler of Borland C++. 3. Borland C++: Choose the desired platform (DOS, Windows3.x, or Win32). If you chose DOS or Windows3.x, select the memory model LARGE. For Win32, it is automatically FLAT. Choose static linking. You should also choose, at least, 386 code generation and real coprocessor commands (i.e., no emulation). Microsoft Visual C++: Choose "single-thread debug" or "multi-thread debug". 4. Add the desired CMATH library to your project list. Borland C++: For DOS programs, this is the library CMATHL3.LIB, for Windows3.x you need CMATHL3W.LIB, for Win32, CMATHF3W.LIB. Microsoft Visual C++: The library needed is CMVCSD.LIB for single-thread debug, or CMVCMTD.LIB for multi-thread debug. 5. In your C++ programs, declare #include <newcplx.h> For C modules, declare: #include <cmath.h> If you are using ObjectWindows or MFC, <newcplx.h> or <cmath.h> must be included after(!) the include files for OWL or MFC. 6. Borland C++, 16-bit programs only: * If the linker option "process extended dictionaries" is available in your version of Borland C++, you must switch it on. Otherwise, you might get a "Table limit exceeded" linker error. * CMATH works with Borland (Turbo) C++, version 3.0 or higher. Since, from version 4.0 on, Borland changed the name of the error handling routine matherr (without underbar) into _matherr (with a leading underbar), any 16-bit program using CMATH has to call a macro, NEWMATHERR, which takes care of redirecting calls to _matherr, if necessary. You should place the call to NEWMATHERR into the module containing main() or OwlMain(): #include ..... #include <nexcplx.h> /* or: #include <cmath.h> */ NEWMATHERR int main( void ) { .......... } If you forget to call NEWMATHERR, you will get a linker error "Unresolved external _matherr" in the Borland C versions from 4.0 on. Inclusion of the macro NEWMATHERR is not needed for 32-bit programs. After these preparations, all CMATH functions are available for your programs. 2.2 De-Installation ------------------- Should you wish to remove CMATH from your computer after testing, please simply delete the directory CMATH with its subdirectories. The installation of CMATH does not affect any files outside its own directory, so there is nothing else to get rid of. **************************************************************************** * * ******* 3. Overview over the Functions of CMATH ******* * * **************************************************************************** For C++, all functions of CMATH are declared in <nexcplx.h>. For C, there are the following three include-files: <cfmath.h> declares all functions for single precision (data type fComplex), <cdmath.h> contains all double-precision functions (data type dComplex), and <cemath.h> lists all functions for extended precision (data type eComplex). The include-file <cmath.h> unites the three include-files just mentioned. In the following, it is often only the fComplex-version of a function that is explicitly mentioned. The versions for dComplex and eComplex are always exactly analogous. All functions for the language C have a prefix denoting the data type on which the function works: "cf_" stands for single precision (arguments and return values of the data type fComplex, sometimes together with float), "cd_" stands for double precision (dComplex and double), whereas "ce_" denotes extended-precision functions. In C++, synonyms are defined for all these functions. The synonyms do not have a prefix, since the data type information is implicitly handled by the C++ compiler. The C++ function names are always identical to those found in the complex class libraries (if the respective function exists there). Of course, if you wish to use the C function names in your C++ modules, you can do so by including <cmath.h> instead of <newcplx.h>. 3.1 Initialization of Complex Numbers ------------------------------------- For C++ modules, there are several overloaded constructors: fComplex fComplex( float RePart, float ImPart ); fComplex fComplex( float RePart ); // imaginary part always 0 fComplex fComplex( dComplex ); fComplex fComplex( eComplex ); The interconversion between the complex types of different level of accuracy may, in the course of down-conversions, lead to OVERFLOW errors. These are are caught and treated via _matherr. Similarly to the constructor fComplex(), also dComplex() and eComplex() exist in overloaded versions performing the same tasks for the classes dComplex and eComplex, respectively. Additionally, both in C++ and in plain-C modules, complex numbers may be initialized by separately assigning a value to the imaginary and real parts, e.g.: z.Re = 3.0; z.Im = 5.7; Alternatively, in plain-C modules, the same initialization can be accomplished by the function fcplx: z = fcplx( 3.0, 5.7 ); For double-precision complex numbers, use dcplx, for extended-precision complex numbers, use ecplx. Since overloading of functions and constructors is specific to C++ and not available in plain C, the interconversions between the various complex types are performed via the functions cftocd, cdtocf, cftoce, cetocf, cdtoce, and cetocd. As described above, OVERFLOW errors in the course of down-conversions are caught and treated via _matherr. 3.2 Basic Complex Operations ---------------------------- The following basic complex operations are defined in CMATH: C function C++ synonym cf_conj conj complex-conjugate form, cf_neg neg (or -) negation, cf_real real extraction of the real part, cf_imag imag extraction of the imaginary part, cf_polar polar conversion of polar coordinates into the "normal", Cartesian complex format cf_abs abs absolute value (magnitude of the pointer in the complex plane; this is treated as a math function with error handling), cf_arg arg argument (angle of the pointer in the complex plane), cf_norm norm norm (defined here as the square of the absolute value) (The cd_ and ce_ versions are exactly analogous to the cf_ version) 3.3 Arithmetic Operations ------------------------- Only C++: The following set of operators is available for all of the three complex classes: + - * / += -= *= /= == != These operators exist also for "mixed" arguments, where one argument is complex, the other real and where the arguments are of different floating-point accuracies. Since it is only the language C++, but not C, which allows to overload the arithmetic operators, all arithmetic operations of complex numbers are implemented in a different way for C modules. Here, we have the functions cf_add addition of two complex numbers cf_addRe addition of a complex number and a real number cf_sub subtraction of two complex numbers (first operand minus the second operand) cf_subRe subtraction of a real number from a complex number cf_subrRe subtraction of a complex number from a real number cf_mul multiplication of two complex numbers cf_mulRe multiplication of a complex number and a real number cf_div division of two complex numbers (first operand divided by the second operand) cf_divRe division of a complex number by a real number cf_divrRe division of a real number by a complex number (similarly the cd_ and ce_ versions) The equality operator "=" is the only operator defined also in C for complex numbers. 3.4 Mathematical Functions -------------------------- CMATH contains all mathematical functions you would find in the complex class libraries, along with several additional ones: C function C++ synonym cf_abs abs ry = | zx | absolute value cf_acos acos zy = acos( zx ) arcus cosine function cf_asin asin zy = asin( zx ) arcus sine function cf_atan atan zy = atan( zx ) arcus tangent function cf_cos cos zy = cos( zx ) cosine cf_cosh cosh zy = cosh( zx ) hyperbolic cosine cf_cubic cubic zy = zx**3 third power cf_exp exp zy = exp( zx ) exponential function cf_inv inv zy = 1.0 / zx inverse cf_ipow ipow zy = zx**n integer power cf_ln ln zy = ln( zx ) natural logarithm cf_log log zy = ln( zx ) identical to cf_ln, ln cf_log2 log2 zy = lb( zx ) binary logarithm cf_log10 log10 zy = lg( zx ) decadic logarithm cf_pow pow zy = zx**zexp arbitrary power cf_powReBase pow, powReBase zy = r**zx real base to complex power cf_powReExpo pow, powReExpo zy = zx**r real power of complex base cf_quartic quartic zy = zx**4 fourth power cf_sin sin zy = sin( zx ) sine cf_sinh sinh zy = sinh( zx ) hyperbolic sine cf_square square zy = zx² square cf_sqrt sqrt zy = sqrt( zx ) square root cf_tan tan zy = tan( zx ) tangent cf_tanh tanh zy = tanh( zx ) hyperbolic tangent (similarly the cd_ and ce_ versions) **************************************************************************** * * ******* 4. Error Handling ******* * * ***************************************************************************** 4.1 General Error Handling of Complex Functions ----------------------------------------------- The error handling of complex functions follows the rules employed also for real-number functions and operations. For all arithmetic operations, the design of the algorithms eliminates the danger of failure due to irregular intermediate results. Overflowing or otherwise irregular final results, however, will lead to a hardware interrupt being generated and, as a consequence, to a program abort. In contrast to the arithmetic operations, all mathematical functions and all data-type interconversions perform a tight error checking and treat any detected error conditions via _matherr (for fComplex and dComplex functions) and _matherrl (for eComplex functions). All error messages eventually generated use the C name (and not the C++ synonym) of the failing function. 16-bit programs only: As mentioned already in chapter 2, Borland has changed the name of the error-handling function "matherr" (without leading underbar), used in the versions 3.x, into "_matherr" (with a leading underbar), from version 4.0 on. In order to make CMATH compatible with both the older and the later versions of Borland C++, the following way of error handling was adopted: In case of an error, all CMATH functions call primarily matherr (as in the older versions of Borland C++). A macro NEWMATHERR provides for the necessary redirection of these calls to _matherr, if a later version of Borland C++ is used. Therefore, NEWMATHERR must be called once (!) in any program using CMATH, after the inclusion of <cmath.h>. The best place is the module containing the main(), WinMain(), or OWLMain() function: #include <cmath.h> #include ... NEWMATHERR ...... main() { ... } If you use CMATH as a part of OptiVec, consult also chapter 5 of HANDBOOK.TXT for further information on floating-point error handling. If you use CMATH separately from OptiVec, you should at least know about some advanced error handling features, borrowed from VectorLib and described in the following chapter. 4.2 Advanced Error Handling: Writing Messages into a File --------------------------------------------------------- ANSI C provides the user-definable function perror to print error messages. However, several compilers, including Borland C++, do not use perror for this purpose. This means that the way error messages are printed is not controllable by the programmer. While this is fine in most instances, there may be situations in which you might, for example, wish the error messages not to be printed to the screen, but rather into a file, so that you could check later what has gone wrong. If you use Borland C++ for Windows, an additional motivation could come from the fact that, for any error, a message box is displayed and program execution interrupted until you acknowledge having taken notice of the error. You might wish to circumvent this. To this end, CMATH borrows from OptiVec the function V_setErrorEventFile. This function needs as arguments the desired name of your event file and a switch named ScreenAndFile which decides if the error message is printed only into the file, or additionally to the screen as well. Example: V_setErrorEventFile( "MyErrors.LOG", 1 ); Note that this redirection of error messages is valid only for errors occurring in CMATH (and, of course, VectorLib) routines. If you care to do so, however, there is a way to extend the redirection also to "non-CMATH/VectorLib" functions: you may modify _matherr and _matherrl so that the statement return 0; (which signals an unresolved error) is replaced by the sequence V_noteError( e->name, e->type ); return 1; Thereby the task of printing the error message for unresolved errors is passed to V_noteError. Keep in mind that it is the return value of _matherr which decides if an error message is printed by the default error handler of Borland C/C++. Thus, after the call to V_noteError, the printing of the default error messages is by-passed by returning "1". (Also, do not forget that it is your(!) _matherr routine which determines which errors you accept and which not.) For example, your _matherr function (matherr - without the leading underbar - for Borland C++ 3.0 and 3.1) might look like the following one: #include <math.h> int _matherr( struct exception *e) { if( (e->type == UNDERFLOW) ││ (e->type == TLOSS) ) /* ignore */ ; else /* all other errors deserve at least notice */ { V_noteError( e->name, e->type ); if (e->type == DOMAIN) exit(1); /* really fatal */ } return 1; } (Of course, if you decide to change _matherr, do not forget to change _matherrl in the same way!). The default printing of error messages on the screen alone is restored by V_closeErrorEventFile(). **************************************************************************** * * ******* 5. Syntax Reference ******* * * **************************************************************************** In the following, the syntax of all CMATH functions of float / fComplex accuracy is given. The syntax of the functions for double and extended precisions is exactly analogous. If you chose the "classic" class complex, this is also similar. Just replace "float" by "double" and "fComplex" by "complex". (Of course, the type-casting operators and the interconversion functions do not exist if there is only one type.) 5.1 C++ Version --------------- At this place, the syntax is given in a simplified form (just what you need to know in order to use these functions). For details of the declaration, see the class complex<float> in <nexcplx.h>. The arithmetic operators are not listed; their use is identical to the use of the real-number operators; suffice it to say they are all available. float abs( fComplex _z ); fComplex acos( fComplex _z ); float arg( fComplex _z ); fComplex asin( fComplex _z ); fComplex atan( fComplex _z ); fComplex cdtocf( dComplex cd ); fComplex cetocf( eComplex ce ); fComplex conj( fComplex _z ); fComplex cos( fComplex _z ); fComplex cosh( fComplex _z ); fComplex cubic( fComplex _z ); fComplex exp( fComplex _z ); fComplex fComplex( float Re_part, float Im_part ); fComplex fComplex( float Re_part ); // constructors fComplex fComplex( dComplex cd ); fComplex fComplex( eComplex ce ); // type-casting constructors float imag(); // to be used as zim = z.imag(); float imag( fComplex _z ); fComplex inv( fComplex _z ); fComplex ipow( fComplex __base, int __expon ); fComplex ln( fComplex _z ); fComplex log( fComplex _z ); fComplex log2( fComplex _z ); fComplex log10( fComplex _z ); fComplex neg( fComplex _z ); float norm( fComplex _z ); fComplex polar( float _mag, float _angle=0 ); fComplex pow( fComplex __base, float __expon ); fComplex powReExpo( fComplex __base, float __expon ); fComplex pow( float __base, fComplex __expon); fComplex powReBase( float __base, fComplex __expon ); fComplex pow( fComplex __base, fComplex __expon); fComplex quartic( fComplex _z ); float z.real(); // to be used as zre = z.real(); float real( fComplex _z ); fComplex sin( fComplex _z ); fComplex sinh( fComplex _z ); fComplex sqrt( fComplex _z ); fComplex square( fComplex _z ); fComplex tan( fComplex _z ); fComplex tanh( fComplex _z ); 5.2 Syntax Reference for the Plain-C Version. Again, the syntax is given in a simplified form here. For details of the declaration, see <cfmath.h>. The prefix cf_ denotes the accuracy level "float / fComplex". For the functions of double/dComplex and extended/eComplex precisions, the prefixes are cd_ and ce_, respectively. Since overloaded operators are specific to C++, only the operator "=" exists for plain C. float cf_abs( fComplex __z ); fComplex cf_acos( fComplex __z ); fComplex cf_add( fComplex __x, fComplex __y ); fComplex cf_addRe( fComplex __x, float __yRe ); float cf_arg( fComplex __z ); fComplex cf_asin( fComplex __z ); fComplex cf_atan( fComplex __z ); fComplex cdtocf( dComplex __zd ); fComplex cetocf( eComplex __ze ); fComplex cf_conj( fComplex __z ); fComplex cf_cos( fComplex __z ); fComplex cf_cosh( fComplex __z ); fComplex cf_cubic( fComplex __z ); fComplex cf_div( fComplex __x, fComplex __y ); fComplex cf_divRe( fComplex __x, float __yRe ); /* x / yRe */ fComplex cf_divrRe( fComplex __x, float __yRe ); /* yRe / x */ fComplex cf_exp( fComplex __z ); fComplex fcplx( float __ReVal, float __ImVal); float cf_imag( fComplex z ); fComplex cf_inv( fComplex __z ); /* 1.0 / z */ fComplex cf_ipow( fComplex __z, int __exponent ); fComplex cf_ln( fComplex __z ); fComplex cf_log( fComplex __z ); fComplex cf_log2( fComplex __z ); fComplex cf_log10( fComplex __z ); fComplex cf_mul( fComplex __x, fComplex __y ); fComplex cf_mulRe( fComplex __x, float __yRe ); fComplex cf_neg( fComplex __z ); float cf_norm( fComplex __z ); fComplex cf_polar( float __mag, float __angle ); fComplex cf_pow( fComplex __base, fComplex __exponent ); fComplex cf_powReBase( float __base, fComplex __exponent ); fComplex cf_powReExpo( fComplex __base, float __exponent ); fComplex cf_quartic( fComplex __z ); float cf_real( fComplex z ); fComplex cf_sin( fComplex __z ); fComplex cf_sinh( fComplex __z ); fComplex cf_square( fComplex __z ); fComplex cf_sqrt( fComplex __z ); fComplex cf_sub( fComplex __x, fComplex __y ); fComplex cf_subRe( fComplex __x, float __yRe ); /* x - yRe */ fComplex cf_subrRe( fComplex __x, float __yRe ); /* yRe - x */ fComplex cf_tan( fComplex __z ); fComplex cf_tanh( fComplex __z ); ***************************************************************************** Although CMATH underwent thorough testing, there is always a possibility that a problem might have escaped our attention. Should you feel you dis- covered a "bug", please kindly try to specify the conditions under which you observed the problem as exactly as possible. Please let the author know what you have found! e-mail: MartinSander@Bigfoot.com Copyright (C) Martin Sander 1996-1999 *****************************************************************************