Fortran 入门——C#调用Fortran DLL

首先建立一个Fortran动态连接库项目,并写一个计算两数之和的函数,代码如下

function MySum(x,y)
implicit none
!DEC$ ATTRIBUTES DLLEXPORT :: MySum
!DEC$ ATTRIBUTES ALIAS:'MySum'::Mysum
integer x,y,MySum
MySum=x+y
end function

Realse编译后,复制生成的DLL.

接着新建一个C#控制台项目,将刚才复制的DLL粘贴到DEBUG目录下.然后添加代码

   class Program
    {
        [DllImport("Dll1.dll", SetLastError = true, CharSet = CharSet.Unicode, CallingConvention = CallingConvention.StdCall)]
        public static extern int MySum(ref int x,ref int y);
        static void Main(string[] args)
        {
            int x = 3;
            int y = 4;
            int result = MySum(ref x, ref y);
            Console.WriteLine(result);
            Console.ReadKey();
        }
    }

 需要添加命名空间:System.Runtime.InteropServices;