怎么比较浮点数?

KornLee

这是我的练习,怎么总出错?[php]
/home/javalee#perl -
$a="1.2345";$b="1.2354"
if($a > $b){print "a is big"}else{print "a is small"};print "\n";__END__
syntax error at - line 2, near "){"
Execution of - aborted due to compilation errors.[/php]
[php]
/home/javalee#perl -
$a=4;$b=3
if($a > $b){print "a is big"}else{print "a is small"};print "\n";__END__
syntax error at - line 2, near "){"
Execution of - aborted due to compilation errors.
/home/javalee#[/php]
这是怎么回事?...:thank
perl version

1. 
   
2. /home/javalee#perl -e 'print "$]\n"'
   
3. 5.008

复制代码

KornLee

奇怪,又可以了 :ask
[php]
/home/javalee#perl -
$a=4;$b=5;
if($a>$b){print "ok\n"}else{print "error\n"};__END__
error
/home/javalee#perl -
$a=4.444;$b=4.445;
if($a>$b){print "ok\n"}else{print "error\n"};__END__
error
[/php]

BBDD

$a=4;$b=3
$a=4;$b=5;

仔细看看这两行有什么区别。

你编程的习惯太差，我建议你看一下perlstyle。初学时，养成良好习惯很重要。

KornLee

最初由 BBDD 发表
$a=4;$b=3
$a=4;$b=5;

仔细看看这两行有什么区别。

你编程的习惯太差，我建议你看一下perlstyle。初学时，养成良好习惯很重要。

谢谢指教!以后还要向高手请教!