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CMATH is a comprehensive library for complex-number arithmetics and mathematics. The following features make CMATH an ideal replacement for other available complex class libraries: 1. High-performance implementation in machine code leads to superior speed. 2. Accuracy and safety are greatly enhanced. 3. Each of the floating-point accuracies (complex(float), complex(double), and complex(extended)) is given its own, individually optimized treatment. 4. Polar coordinates (magnitude;angle) are supported in addition to the usual cartesian coordinates (real;imaginary). 5. Switching from your compiler's complex class library to CMATH is very simple: Just replace the include-file &<complex.h&> with &<newcplx.h&> - that's it! The Shareware edition contains the 64-bit library for P8+ (any 64-bit Intel or AMD processor) as well as the 32-bit libraries for P8 (at least Intel Core2Duo or AMD64x2) and for P4 (full floating-point accuracy, back-compatible to Pentium and even 486DX). This version is for GCC Win64 and Win32.