perl Math::BigInt->config()用法及代码示例

Math::BigIntPerl中的module提供了代表具有任意精度的整数和重载算术运算符的对象。

Math::BigInt模块的config()方法用于获取有关Perl模块的配置的信息。

用法： Math::BigInt->config()

参数：没有

返回：包含配置的哈希，例如类名，版本号，库等

范例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

范例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

相关用法

注：本文由纯净天空筛选整理自Code_Mech大神的英文原创作品 Perl | Math::BigInt->config() method。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。