mirror of https://github.com/mkerrisk/man-pages
33 lines
718 B
Groff
33 lines
718 B
Groff
.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
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.\" Distributed under GPL
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.\"
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.TH CREAL 3 2002-07-28 "" "Linux Programmer's Manual"
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.SH NAME
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creal, crealf, creall \- get real part of a complex number
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.SH SYNOPSIS
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.B #include <complex.h>
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.sp
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.BI "double creal(double complex " z );
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.br
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.BI "float crealf(float complex " z );
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.br
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.BI "long double creall(long double complex " z );
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.sp
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Link with \fI\-lm\fP.
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.SH DESCRIPTION
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The
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.BR creal ()
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function returns the real part of the complex number
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.IR z .
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.LP
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One has z = creal(z) + I * cimag(z).
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.SH "CONFORMING TO"
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C99
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.SH NOTES
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The gcc supports also __real__.
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That is a GNU extension.
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.SH "SEE ALSO"
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.BR cabs (3),
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.BR cimag (3),
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.BR complex (7)
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