No, you only have display and convert functions.
A member function is a member of the class such as currencies::printEURO(). main is not a member function, it's a global function.
Also I see you're using variable syntax for member functions which will probably generate more errors. The correct syntax is classname, no space, colon, no space, colon, no space, function name, for example currencies::printEURO(). All of the following are wrong and why:
currencies: :getUSDtoYen -> no space between the colons
currencies:: printJPY -> no space after the colons
currencies.USDtoEURO -> two colons, not dot
currencies: : printEURO -> no spaces between or after the colons.