init(_exponent: Int32, _length: UInt32, _isNegative : UInt32, _isCompact : UInt32, _reserved: UInt32, _mantissa: (UInt16, UInt16, UInt16, UInt16, UInt16, UInt16, UInt16, UInt16))
Creates a decimal initialized according to the provided characteristics.
提供された特徴に従って初期化される10進数を作製します。