.TH ZGCD 3 libzahl
.SH NAME
zgcd - Calculates the greatest common divisor
.SH SYNOPSIS
.nf
#include <zahl.h>

void zgcd(z_t \fIgcd\fP, z_t \fIa\fP, z_t \fIb\fP);
.fi
.SH DESCRIPTION
.B zgcd
calculates the greatest common divisor
between
.I a
and
.I b
and stores the result in
.IR gcd .
.SH SEE ALSO
.BR zdiv (3)