So those are in fact the patterns of zeroes and ones, the bytes that would have been outputted had I hello c remembered to download the compiler to this computer and run it on that little hello.c file.

这些都是0和1的模式，如果我记得下载编译器到计算机上的话,我们就能运行下这个,然后看看输出的字节。

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

> What's the difference between a compiler and a Makefile?

>，编译器和Makefile有什么区别？

哈佛公开课 - 计算机科学课程节选