基本unix ./语法 [英] basic unix ./ syntax

问题描述

我正在从OS X终端编译c ++程序：

I'm compiling c++ programs from the OS X Terminal:

> g++ a.cpp

然后从终端运行程序：

> ./a.out

./ 语法是什么意思？这与 ./ run 有关吗？

What does the ./ syntax mean? Is this somehow related to ./run?

推荐答案

。表示当前目录，因此 ./ a.out 表示 a.out 在当前目录中。如果你只键入 a.out ，而没有 ./ ，那么系统将查看目录路径（ $ PATH ）来查找程序，而不是查看当前目录。

. means "the current directory", so ./a.out means "the file named a.out in the current directory". If you were to type simply a.out, without the ./, then the system would look through the directories on the path ($PATH) to find the program, instead of looking in the current directory.

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