[英]How to call a function in the same file of main from a function in another file
I have a program with multiple headers and cpp files, I want to call a function defined in the same file main is defined (from a function defined in another file). 我有一个包含多个头文件和cpp文件的程序,我想调用在同一文件中定义的函数,主要是从另一个文件中定义的函数定义的。 If I'm correct, the file with the main function never has a corresponding header, right?
如果我是对的,则具有main函数的文件将永远没有相应的标头,对吗? How would I do it?
我该怎么办?
Why wouldn't you be allowed to have a header for functions inside main.cpp
? 为什么不允许您在
main.cpp
使用函数的标头? Assuming main.cpp
defines main
and foo
, nothing prevents you from having a header containing the declaration of foo
. 假设
main.cpp
定义了main
和foo
,那么没有什么可以阻止您使用包含foo
声明的标头。
In fact, some libraries and frameworks make their own main
. 实际上,某些库和框架是自己的
main
。 In cases like these, you just link against the library that contains the main
. 在这种情况下,您只需链接到包含
main
的库即可。
For example, if you look at the last example code of this page of Boost's Unit Test Framework, you will see there is no main
. 例如,如果您查看Boost的单元测试框架页面的最后一个示例代码,您将看到没有
main
。 The main
is already written for you inside the Boost Unit Test Framework library. 已经在Boost Unit Test Framework库中为您编写了
main
。
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