但是输入不是浮点数的话,我这里就会显示一个消息说，你搞砸了，该稍微有点礼貌吧？,然后我们继续执行循环,一直到得到正确类型的输入。

But if it is not, it's going to print out a message here saying, you screwed up, somewhat politely, and it's going to go back around. So it'll just cycle until I get something of the right type.

youdao

如果我想要解决这个问题，这就是我要解决它的方式了，第一件我要做的事情就是要，输入一个浮点数作为三角形的底。

So if I were to solve this problem, here's the way I would do it. I would say, first thing I want to do, is I want to input a value for the base as a float.

youdao

其中一个构造函数以双精度浮点数作为输入，另一个以整数和换算因子作为输入，还有一个以小数的String表示作为输入。

One takes a double-precision floating point as input, another takes an integer and a scale factor, and another takes a String representation of a decimal number.

youdao

But if it is not, it's going to print out a message here saying, you screwed up, somewhat politely, and it's going to go back around. So it'll just cycle until I get something of the right type.

但是输入不是浮点数的话,我这里就会显示一个消息说，你搞砸了，该稍微有点礼貌吧？,然后我们继续执行循环,一直到得到正确类型的输入。

麻省理工公开课 - 计算机科学及编程导论课程节选

OK, says it says enter a float. I give it something that can be converted into a float, it says fine. I'm going to go back and run it again though. If I run it again, it says enter a float.

好了，看到他说输入一个浮点数,我输入它可以转换为浮点数的值,那没问题，我回过来再运行一遍,如果我再运行一遍。

麻省理工公开课 - 计算机科学及编程导论课程节选

I could generalize this pretty nicely. Imagine the same kind of idea where I want to simply say I want to take input of anything and try and see how to make sure I get the right kind of thing. I want to make it polymorphic.

对吧，我试着输入浮点数,我能更好的一般化它,想象下类似的想法，我需要输入些什么,然后看看输入的是否正确,我想使他更多元化些。

麻省理工公开课 - 计算机科学及编程导论课程节选