VS2008生成DLL并使用

 1 namespace MathFuncs
 2 {
 3     class MyMathFuncs
 4     {
 5     public:
 6         // Returns a + b
 7         static __declspec(dllexport) double Add(double a, double b);
 8  
 9         // Returns a - b
10         static __declspec(dllexport) double Subtract(double a, double b);
11  
12         // Returns a * b
13         static __declspec(dllexport) double Multiply(double a, double b);
14  
15         // Returns a / b
16         // Throws DivideByZeroException if b is 0
17         static __declspec(dllexport) double Divide(double a, double b);
18     };
19 }

 1 // MathFuncsDll.cpp
 2 // compile with: /EHsc /LD
 3  

 4 #include "MathFuncsDll.h"
 5  
 6 #include <stdexcept> 7  
 8 using namespace std;
 9  
10 namespace MathFuncs
11 {
12     double MyMathFuncs::Add(double a, double b)
13     {
14         return a + b;
15     }
16  
17     double MyMathFuncs::Subtract(double a, double b)
18     {
19         return a - b;
20     }
21  
22     double MyMathFuncs::Multiply(double a, double b)
23     {
24         return a * b;
25     }
26  
27     double MyMathFuncs::Divide(double a, double b)
28     {
29         if (b == 0)
30         {
31             throw new invalid_argument("b cannot be zero!");
32         }
33  
34         return a / b;
35     }
36 }