The single input and output parameter definition are highlighted in bold.
单个输入和输出参数定义以粗体突出显示。
If I only looked up the fields as needed, it would be easy to break a parameter definition (for instance, by mistyping the corresponding field name) without realizing that anything was wrong.
如果我只是查找需要的字段，那么就很容易破坏一个形参定义(例如，输错相应的字段名)，而且还不能认识到有错误发生。
Listing 6. int parameter definition class.
清单6 . int形参定义类。
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