質問編集履歴
2
マークを付けました
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1
行間整理
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このプログラムを走らせると
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ex1302.rb:42:in `listAllStudents': undefined local variable or method `setUpStudents' for #<StudentBook:0x27a4088 @students={}> (NameError)
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from ex1302.rb:52:in `<main>'
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