$**$

$*$ Accepts an array of characters representing the bits in a two's complement number

$*$ and returns the decimal equivalent.

$*$

$*$ precondition:

$*$ This method requires that the maximum length of the parameter array is $16.$

$*$

$*$ postcondition:

$*$ The value returned is the decimal equivalent of the two's complement parameter.

$*$ The parameter array is unchanged.

$*$

$*$ @param theBits an array representing the bits in a two's complement number

$*$ @throws IllegalArgumentException if the length of the parameter array $>16.$

$*$ @return the decimal equivalent of the two's complement parameter

$*/$

public static int convert$2$sCompToDecimal$($final char$[]$ theBits$)\{$