exp.t

UNIX下perl实现代码

#!./perl

# $RCSfile: exp.t,v $$Revision: 4.1 $$Date: 92/08/07 18:27:50 $

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";}