天天向上

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ex13Operations1
{
     public class Operations
     {
         public static double Addition(double x, double y)
         {
             return x + y;
         }
         public static double Subtraction(double x, double y)
         {
             return x - y;
         }
         public static double Multiplication(double x, double y)
         {
             return x * y;
         }
         public static double Division(double x, double y)
         {
             if (y == 0) return 0;
             return x / y;
         }
     }
}

修改輸出DLL名稱

===================================================================

新增Console專案ex13CallOperation1DLL

目的:測試剛才建立DLL

加入參考

選擇Operations1.dll所在路徑

C:\Users\ryanwang\Documents\Visual Studio 2008\Projects\ex13Operations1\ex13Operations1\bin\Release

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using ex13Operations1;

namespace ex13CallOperation1DLL
{
     class Program
     {
         static void Main(string[] args)
         {
             double num1 = 1.5;
             double num2 = 2.3;
             double result;
             result = Operations.Addition(num1, num2);
             Console.WriteLine("{0} + {1} = {2}\n", num1, num2, result);
             Console.ReadLine();
         }
     }
}

==================================================================

加入一個新method至Operations類別

public static void RandSeq(int number, int maxValue, out int []sequence)
{
     sequence = new int[number];
     Random rand = new Random();
     for (int i = 0; i < number; i++)
         sequence[i] = rand.Next(maxValue);
}

回主程式

int[] seq;
int number = 10;
int maxValue = 10;
Operations.RandSeq(number, 100, out seq);
for (int i = 0; i < number; i++)
     Console.WriteLine("seq[{0}]={1}", i, seq[i]);