Often developers will add many fields to classes without realizing that each int field they add to a class will be multiplied by a large factor (the number of instances) at run time.

通常，开发人员会为类添加很多字段，而未意识到为类所添加的每个整型字段都会在运行时与一个较大的因数（实例数量）相乘。

youdao

To create a template class such as template class oneT, int X> {int op(){}};, create a UML class and then add the following two template parameters and one UML operation

要创建一个模板类，例如：template class oneT, int X> {int op(){}};，首先创建一个 UML 类，然后添加下面两个模板参数和一个 UML 操作

youdao

Here we will add three fields: id, name, and address of types int, text, and text, respectively. Your screen should look like this.

我们将在这里添加3个域：id、name和address，类型分别为int、text和text。

youdao

Sometimes the functions -- sometimes a function can be used on multiple data types, plus, for example, we saw could add strings, or could add ints, but each one of those data types has associated with it a set of functions that are geared to handling them.

比如说，我们可以对string类型,进行add操作,也可以对int类型进行这个操作，但是这些数据类型中的每一种，都与适合于操作它们的,方法集相关联,我们想对我们创建的数据,类型做同样的事情。

麻省理工公开课 - 计算机科学及编程导论课程节选