明解Ｃ言語 入門編 > 6. 関数 > 逐次探索 Ruby NINSU = 5 FAILED = -1 def search(key, no, ary) i = 0 while (1) return FAILED if (i == no) return i + 1 if (ary[i] == key) i += 1 end end ary = [83, 55, 777, 499, 20] key = 18 idx = search(key, NI…