パラメタを設定するメソッドを、各派生クラスに応じて定義します。 入力ストリーム aSr で指定されるファイルからデータを読みとってパラメタを設定します。
Declares method "setParameter()" as abstract method. In classes derived from class Element, its definition should be given. Parameters are read in the input stream "aSr". It is necessary to create an element model according to each inherited class. Data is read in the file specified by the input stream "aSr", and the amount of initial states is set up. Please have the program and consistency which save the last state at a file.