public ValueEval evaluate(int srcRowIndex, int srcColumnIndex, ValueEval inumberVE) {ValueEval veText1;try {veText1 = OperandResolver.getSingleValue(inumberVE, srcRowIndex, srcColumnIndex);} catch (EvaluationException e) {return e.getErrorEval();}String iNumber = OperandResolver.coerceValueToString(veText1);Matcher m = COMPLEX_NUMBER_PATTERN.matcher(iNumber);boolean result = m.matches();String imaginary = "";if (result) {String imaginaryGroup = m.group(5);boolean hasImaginaryPart = imaginaryGroup.equals("i") || imaginaryGroup.equals("j");if (imaginaryGroup.length() == 0) {return new StringEval(String.valueOf(0));}if (hasImaginaryPart) {String sign = "";String imaginarySign = m.group(GROUP3_IMAGINARY_SIGN);if (imaginarySign.length() != 0 && !(imaginarySign.equals("+"))) {sign = imaginarySign;}String groupImaginaryNumber = m.group(GROUP4_IMAGINARY_INTEGER_OR_DOUBLE);if (groupImaginaryNumber.length() != 0) {imaginary = sign + groupImaginaryNumber;} else {imaginary = sign + "1";}}} else {return ErrorEval.NUM_ERROR;}return new StringEval(imaginary);}

public override ValueEval Evaluate(int srcRowIndex, int srcColumnIndex, ValueEval inumberVE){ValueEval veText1;try{veText1 = OperandResolver.GetSingleValue(inumberVE, srcRowIndex, srcColumnIndex);}catch (EvaluationException e){return e.GetErrorEval();}String iNumber = OperandResolver.CoerceValueToString(veText1);System.Text.RegularExpressions.Match m = COMPLEX_NUMBER_PATTERN.Match(iNumber);bool result = m.Success && m.Groups[0].Length>0;String imaginary = "";if (result == true){String imaginaryGroup = m.Groups[5].Value;bool hasImaginaryPart = imaginaryGroup.Equals("i") || imaginaryGroup.Equals("j");if (imaginaryGroup.Length == 0){return new StringEval(Convert.ToString(0));}if (hasImaginaryPart){String sign = "";String imaginarySign = m.Groups[(GROUP3_IMAGINARY_SIGN)].Value;if (imaginarySign.Length != 0 && !(imaginarySign.Equals("+"))){sign = imaginarySign;}String groupImaginaryNumber = m.Groups[(GROUP4_IMAGINARY_INTEGER_OR_DOUBLE)].Value;if (groupImaginaryNumber.Length != 0){imaginary = sign + groupImaginaryNumber;}else{imaginary = sign + "1";}}}else{return ErrorEval.NUM_ERROR;}return new StringEval(imaginary);}
