CS计算机代考程序代写 class PhoneBook

class PhoneBook
def initialize
end

def add(name, number, is_listed)
raise Exception, “Not implemented”
end

def lookup(name)
raise Exception, “Not implemented”
end

def lookupByNum(number)
raise Exception, “Not implemented”
end

def namesByAc(areacode)
raise Exception, “Not implemented”
end
end

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