What does it do? It has height, it says, I've got two names of things: the request message and the error message.

那它是用来干嘛的呢？,它声明了包含两个对象：,要求输入的信息和输入类型错误信息。

麻省理工公开课 - 计算机科学及编程导论课程节选

> David: An error message of some sort like "file not found" or "commands not found."

>，大卫：会出现一个错误信息像“没找到文件“,或“没找到命令“

哈佛公开课 - 计算机科学课程节选

But the take away for now is that if you don't clue -lcs50, -- you get some mention -- some error message -- about "undefined symbol," and that should be your clue that, "Oh it's undefined in that I haven't told the compiler that I want to link in these zeros and ones."

但现在如果你删除“-lcs50“,你们会得到一些提示--一些错误信息-,像“未定义的符号“，这可以为你提过线索，“这个没有被定义，我没有告诉编译器,把想把这个与“1“和“0“建立连接，“

哈佛公开课 - 计算机科学课程节选