4.4BSD/usr/src/contrib/perl-4.036/t/op/exp.t

#!./perl

# $Header: exp.t,v 4.0 91/03/20 01:52:31 lwall Locked $

print "1..6\n";

# compile time evaluation

$s = sqrt(2);
if (substr($s,0,5) eq '1.414') {print "ok 1\n";} else {print "not ok 1\n";}

$s = exp(1);
if (substr($s,0,7) eq '2.71828') {print "ok 2\n";} else {print "not ok 2\n";}

if (exp(log(1)) == 1) {print "ok 3\n";} else {print "not ok 3\n";}

# run time evaluation

$x1 = 1;
$x2 = 2;
$s = sqrt($x2);
if (substr($s,0,5) eq '1.414') {print "ok 4\n";} else {print "not ok 4\n";}

$s = exp($x1);
if (substr($s,0,7) eq '2.71828') {print "ok 5\n";} else {print "not ok 5\n";}

if (exp(log($x1)) == 1) {print "ok 6\n";} else {print "not ok 6\n";}