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HP-UX Reference > C
cabs(3M)HP Integrity Server OnlyHP-UX 11i Version 3: February 2007 |
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NAMEcabs(), cabsf(), cabsl(), cabsw(), cabsq() — complex absolute value (also called norm, modulus, or magnitude) functions SYNOPSIS#include <complex.h> double cabs(double complex z); float cabsf(float complex z); long double cabsl(long double complex z); extended cabsw(extended complex z); quad cabsq(quad complex z); DESCRIPTIONThese functions are available only for Integrity servers. cabs() returns the complex absolute value of z. cabsf() is a float complex version of cabs(); it takes a float complex argument and returns a float result. cabsl() is a long double complex version of cabs(); it takes a long double complex argument and returns a long double result. cabsw() is an extended complex version of cabs(); it takes an extended complex argument and returns an extended result. cabsq() is equivalent to cabsl() on HP-UX systems. USAGETo use these functions, compile with the default -Ae option. To use cabsw() or cabsq(), compile with the -fpwidetypes option. Make sure your program includes <complex.h>. Link in the math library by specifying -lm on the compiler or linker command line. RETURN VALUEcabs(z) returns the same values and raises the same floating-point exceptions as hypot(creal(z),cimag(z)). If the +Ocxlimitedrange compiler option is in effect, then cabs() may be computed with a faster method that does not match the regular specification for infinite and for extreme-magnitude extended and quad values. The HP C/C++ default is +Onocxlimitedrange. The +Ofltacc=relaxed option implies +Ocxlimitedrange. |
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