C notes _ dynamic and static libraries

1, static library

• create
  • Project configuration property is set to a static library lib, edit files, and .h .c files can be generated.
• use
  • method one:
    • Add the header file directory of the project: Project properties --- --- Configuration Properties --- c / c ++ --- General --- Additional include directories: add the header file storage directory.
    • Add file references a static library lib path: Project properties --- --- --- Configuration Properties Linker --- --- Additional conventional library catalog: plus lib file storage directory.
    • Then add a project reference to the lib file name: Project properties --- --- --- Configuration Properties Linker Input --- --- Additional Dependencies: add lib file name.
  • Method Two:
    • #pragma comment(lib,"./mylib.lib")
  • Method three:
    • Like adding .h and .c files, add the lib file to the project file list to go.
    • Switch to the "solution view" ---> you want to add lib project -> right click -> "Add" -> "Existing Item" -> lib Select File -> OK.

2, dynamic library

• create

  • Project configuration property is set to dll static library files and edit .h .c files;

    Header file declared as __declspec (dllexport) function declaration;

    ​ 例：__declspec(dllexport) int MyNum(int a, int b)

• use

  • method one:

    #pragma comment(lib,"./mydll.lib")

  • Method Two:

    HANDLE hDll;

    hDll = LoadLibrary("mydll.dll");

3, the advantages and disadvantages

• Static library advantages and disadvantages:
  • Static library for linked library is on the compile-time completion of the static library is copied to the program at the link stage of the program, and when the program is running does not matter;
  • Program at run-time libraries with no connection to facilitate the transplant.
  • Waste of space and resources, all object files and libraries involved are linked into one executable file.