珀尔 | Math::BigInt->config() 方法

珀尔 | Math::BigInt->config() 方法

Perl 中的Math::BigInt模块提供了表示具有任意精度和重载算术运算运算符的整数的对象。

Math::BigInt模块的config()方法用于获取 Perl 模块的配置信息。

Syntax: Math::BigInt->config()

Parameter: None

Returns: a hash containing the configuration, e.g.class name, the version number, library, etc.

示例 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";

输出：

$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

示例 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";

输出：

$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