answer in c++; create the function ToBinaryMantissa() whose header is string ToBinaryMantissa(string value) it must complete the task: If value is a case-insensitive hexadecimal string between 0 and 1...

answer in c++;


create the function ToBinaryMantissa() whose header is
string ToBinaryMantissa(string value)

it must complete the task:
If value is a case-insensitive hexadecimal string between 0 and 1 exclusively, the function returns the conversion of value to a binary string; otherwise, the function returns an empty string. For instance, the caller ToBinaryMantissa('0.36') will return '0