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,“
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