Shulou(Shulou.com)06/02 Report--

Library:

Using the technology of Library, compiled symbols can be made available to third parties.

There are two types of libraries:

1. Dynamic library Dynamic-Link Library (DLL) (called Shared Library under Linux)

2. Static library Static Library

I. creation and use of dynamic libraries

Create a DLL:

Create a console project of type "dll" with VC, and VC will automatically create a project framework for DLL

It automatically generates a DllMain function, which can be compared to the main function in ordinary applications.

VC project settings:

1. Cancel the "precompiled header file"

2. Change it to "/ MTd compilation"

3. Modify the name of the output DLL (my.dll)

Compile to get * .lib and * .dll, where:

* .dll:

Contains instructions compiled into all the code

* .lib: contains a list of the symbols contained in the table name my.dll and the location of each symbol in the dll. (exported symbol)

So, * .lib is much smaller than the file size of * .dll

If you want to export a global function, declare it with the keyword _ _ declspec (dllexport)

Note: this is a keyword specific to VC platform and is not available on linux platform.

The use is as follows:

Template _ declspec (dllexport) void MySwap (T & obj1, T & obj2) {T tmp = obj1; obj1 = obj2; obj2 = tml;}

Use dll:

# pragma comment (lib, "12_18_DLL01") _ declspec (dllimport) int Add (int a, int b); int main () {int ret = Add (1,2); std::cout

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