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Test Your Knowledge in Computers #599
Difficulty: Medium
For modern C programming, defining functions is a two step process. First, you declare a function and its signature using a prototype. Then you define the function by providing a function body that defines what the function does.
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cabsf(3m) [opensolaris man page]

cabs(3M)						  Mathematical Library Functions						  cabs(3M)

NAME
cabs, cabsf, cabsl - return a complex absolute value SYNOPSIS
c99 [ flag... ] file... -lm [ library... ] #include <complex.h> double cabs(double complex z); float cabsf(float complex z); long double cabsl(long double complex z); DESCRIPTION
These functions compute the complex absolute value (also called norm, modulus, or magnitude) of z. RETURN VALUES
These functions return the complex absolute value. ERRORS
No errors are defined. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
complex.h(3HEAD), attributes(5), standards(5) SunOS 5.11 12 Jul 2006 cabs(3M)

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