Perl | Math::BigInt->config()方法

原文:https://www . geesforgeks . org/perl-mathbigint-config-method/

**Math::BigInt**Perl 中的模块提供了用任意精度和重载算术运算符表示整数的对象。

config() 方法中的 Math::BigInt 模块用来获取关于 Perl 模块的配置信息。

语法:数学:BigInt- >配置()

参数:无

返回:包含配置的散列，例如类名、版本号、库等。

例 1:

#!/usr/bin/perl 

# Import Data Dumper Module
use Data::Dumper;

# Import Math::BigInt module 
use Math::BigInt; 

print Dumper(Math::BigInt->config());

print Math::BigInt->config()->{version}, "\n";

Output:

$VAR1 = {
          'precision' => undef,
          'upgrade' => undef,
          'accuracy' => undef,
          'div_scale' => 40,
          'trap_nan' => 0,
          'lib_version' => '1.9997',
          'trap_inf' => 0,
          'version' => '1.9997',
          'round_mode' => 'even',
          'lib' => 'Math::BigInt::Calc',
          'class' => 'Math::BigInt',
          'downgrade' => undef
        };
1.9997

例 2:

#!/usr/bin/perl 

# Import Data Dumper Module
use Data::Dumper;

# Import Math::BigInt module 
use Math::BigInt; 

print Dumper(Math::BigInt->config());

print Math::BigInt->config()->{lib}, "\n";

Output:

$VAR1 = {
          'lib' => 'Math::BigInt::Calc',
          'class' => 'Math::BigInt',
          'accuracy' => undef,
          'upgrade' => undef,
          'round_mode' => 'even',
          'div_scale' => 40,
          'trap_nan' => 0,
          'lib_version' => '1.9997',
          'version' => '1.9997',
          'precision' => undef,
          'trap_inf' => 0,
          'downgrade' => undef
        };
Math::BigInt::Calc

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