C++ dll实例

动态链接库的制作:

Windows桌面向导-应用程序类型:动态链接库(.dll) 空项目 MyDynamicLib

头文件声明函数时,在前面加上 extern "C" __declspec(dllexport)

1 //MyDynamicLib.h
2 #pragma once
3 extern "C" __declspec(dllexport) int GetMaxCommDiv(int a, int b);
4 extern "C" __declspec(dllexport) int GetMinCommMul(int a, int b);

 1 //MyDynamicLib.cpp
 2 #include "MyDynamicLib.h"
 3 
 4 int GetMaxCommDiv(int a, int b)
 5 {
 6     int x = 1;
 7     int ires;
 8     if (a < b)
 9         return 0;
10     if (b == 0)
11         return 0;
12     while (x != 0)
13     {
14         x = a % b;
15         a = b;
16         ires = b;
17         b = x;
18     }
19     return ires;
20 }
21 
22 int GetMinCommMul(int a, int b)
23 {
24     int x = 1;
25     int ires;
26     int m, n;
27     m = a; n = b;
28     if (a < b)
29         return 0;
30     if (a == 0)
31         return 0;
32     if (b == 0)
33         return 0;
34     while (x != 0)
35     {
36         x = a % b;
37         a = b;
38         ires = b;
39         b = x;
40     }
41     ires = (m * n) / ires;
42     return ires;
43 }