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cacosh.3: Add example program 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2011-09-16 05:19:27 +02:00
parent 4c3fa19d23
commit 8b57a223ab
1 changed files with 30 additions and 0 deletions
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man3/cacosh.3
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@ -36,6 +36,36 @@ One has:
These functions first appeared in glibc in version 2.1.
.SH "CONFORMING TO"
C99.
.SH EXAMPLE
.nf
/* Link with "\-lm" */
#include <complex.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
int
main(int argc, char *argv[])
{
double complex z, c, f;
if (argc != 3) {
fprintf(stderr, "Usage: %s <real> <imag>\\n", argv[0]);
exit(EXIT_FAILURE);
}
z = atof(argv[1]) + atof(argv[2]) * I;
c = cacosh(z);
printf("cacosh() = %6.3f %6.3f*i\\n", creal(c), cimag(c));
f = 2 * clog(csqrt((z + 1)/2) + csqrt((z \- 1)/2));
printf("formula = %6.3f %6.3f*i\\n", creal(f2), cimag(f2));
exit(EXIT_SUCCESS);
}
.fi
.SH "SEE ALSO"
.BR acosh (3),
.BR cabs (3),