function Human(self,name,sex,age) {
self["property___name"] = name
self["property___sex"] = sex
self["property___age"] = age
self["method___say"] = "Human___say"
}
function Human___say(self) {
printf "私は%s。%d歳の%sです。\n", self["property___name"], self["property___age"], self["property___sex"]
}

function Japanese(self,name,sex,age) {
Human(self,name,sex,age)
self["method___say"] = "Japanese___say"
}
function Japanese___say(self) {
printf "私は%s。%d歳の%sです。国籍は日本です。\n", self["property___name"], self["property___age"], self["property___gender"]
}

function methodcall(obj,methodname, m) {
m = obj["method___" methodname]
@m(obj)
}

BEGIN {
Human(alice, "アリス", "女", 11)
Japanese(taro, "太郎", "男", 15)
Japanese(yuka, "由佳", "女", 18)
methodcall(alice,"say")
methodcall(taro,"say")
methodcall(yuka,"say")
}