DLL的创建

要用__declspec(dllexport)声明导出函数

1 #include <stdio.h>
2 __declspec(dllexport) int sum(int a,int b)
3 {
4     printf("Welcome to use DLL !\n");
5     printf("input : %d  %d\n",a,b);
6     return a + b;
7 }

GCC编译时要加上-shared参数

MSVC编译时可使用

cl /c SourceFileName

link /dll ObjectFileName

C语言调用

 1 #include <stdio.h>
 2 #include <stdlib.h>
 3 #include <windows.h>
 4 int main(int argc,char *argv[]) 
 5 {
 6     int i;
 7     for(i=0;i<argc;i++)
 8         printf("argv[%d] : %s\n",i,argv[i]);
 9         
10     HINSTANCE hdll = LoadLibrary("dll.dll");
11     int (*func)(int,int)= GetProcAddress(hdll,"sum");
12     int ret;
13     ret=func(((int)argv[1][0])-48,((int)argv[2][0])-48);
14     printf("Return : %d",ret);
15     return 0;
16 }

Python调用

1 from ctypes import cdll
2 import os
3 path = os.getcwd() + '/dll.dll'
4 fun = cdll.LoadLibrary(path)
5 a=int(input("Please input the first integrate : "))
6 b=int(input("Please input the second integrate : "))
7 print("output : ",fun.sum(a,b))
8 input()