Two Dimensional Arrays - Intro to Java ProgrammingYouTube↗  IA↗(long shot)
Education  3.7K views 7 likes 12 dislikes   23 Feb 2015
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The homework scores class may be useful for storing a single student's grades.
1人の生徒の成績を保存するには homeworkScoresクラスが役立ちました
And you can get useful information out of a single student's scores. But when
1人の生徒のスコアから情報は十分得られましたが
my friend Sarel was teaching math, that wasn't enough information for her. She
数学を教えていた私の友人は さらに情報を必要としていました
wanted information about her teaching skills, as well as detailed summaries for
生徒の情報だけでなく 指導力についても知りたかったのです
the students. She wanted to know how well she had taught fractions. And how
例えば分数をうまく教えられたか
well she taught equivalent fractions. And for that, she would need to compare
同値分数をうまく教えられたかを 確認したかったのです
the data for all of the students for one topic. This is starting to look like a
そのためにはトピックごとに 全生徒のデータを比較する必要があります
2-D array. With this structure it would be possible to calculate the total for
二次元配列を使えば1人の生徒の合計と
a student. And also to calculate the total for a topic, which would allow her
1つのトピックの合計が算出できます
to compute sums for each topic. And then compare them, to see which topics she
各トピックの合計を算出しそれらを比較すれば
needed to spend more time on. Once that was done, she could write very
どのトピックに時間をより割くべきか分かります
detailed, customized teacher comments for each student, by looking at what they
そしてトピックごとに各生徒のスコアを見ながら
got in each topic, and choosing different sentences based on that grade. We're
ぞれぞれに必要なアドバイスができます
going to implement this together. I'm going to make a class. The GradeBook
ではこれを一緒に実装してみましょう 私がGradeBookクラスを作成します
class, which will contain a 2-D array, of all of the scores. It'll also
これは二次元配列ですべてのスコアを含みます
contain, the names of the students, and the names of the topics. Since you
そして生徒名とトピック名も含みます
probably don't want to enter these scores over and over again, I wrote a method
スコアを何度も入力したくないので
that will read the GradeBook scores, from the files, and put them into the array for you.
ファイルからスコアを読み 配列に入れるメソッドを作成しました
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