C＃：設置線程和獲取函數返回值

Question

我想創建一個控制檯應用程序，它將爲四個函數創建四個線程，然後獲取函數將返回的內容。線程1必須計算一個用隨機數填充的數組的總和並返回它，線程2計算同一數組的產品並將其返回，線程3創建並返回一個-1000,1000之間的隨機整數，第四個取和，產品和x（隨機數），比較它們並顯示誰比誰更大。

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

    namespace threadsproject 
    { 
     class Program 
     { 
      public int thread1(int [] a, int n) 
      { 
       int i = n; 
       int sum = 0; 
      for (int j = 0; j < i; j++) 
      { 
       sum = a[j] + sum; 
      } 
      Console.WriteLine("\nThe sum is: "); 
      return sum; 
     } 
      public int thread2(int[] a, int n) 
      { 
     int prod = 1; 
     for (int j = 0; j < n; j++) 
     { 
      prod = a[j] * prod; 
     } 
     Console.WriteLine("\nThe product is: "); 
     return prod; 
    } 
    public int thread3() 
    { 
     Random rnd = new Random(); 
     int x; 
     x = rnd.Next(-1000, 1000); 
     Console.WriteLine("\nYour random number is: {0}", x); 
     return x; 
    } 
    public void thread4(int sum, int prod, int x) 
    { 
     Console.WriteLine("\n"); 
     if (sum < prod && prod < x) 
     { 
      Console.WriteLine("T1,T2,T3"); 
     } 
     else if (sum < x && x < prod) 
     { 
      Console.WriteLine("T1,T3,T2"); 
     } 
     else if (x < sum && sum < prod) 
     { 
      Console.WriteLine("T2,T1,T3"); 
     } 
     else if (x < prod && prod < sum) 
     { 
      Console.WriteLine("T2,T3,T1"); 
     } 
     else if (prod < sum && sum < x) 
     { 
      Console.WriteLine("T3,T1,T2"); 
     } 
     else if(prod < sum && sum == x) 
     { 
      Console.WriteLine("T3,T1=T2"); 
     } 
     if (sum < prod && prod == x) 
     { 
      Console.WriteLine("T1,T2==T3"); 
     } 
     else 
      Console.WriteLine("T3,T2,T1"); 
    } 

    static void Main(string[] args) 
    { 
     Random rnd = new Random(); 
     string s; 
     int n; 
     int [] numbers = null; 
     Console.WriteLine("Give the size of the array: "); 
     s = Console.ReadLine(); 
     n = int.Parse(s); 
     for(int i=0; i<n; i++) 
     { 
      numbers[i] = rnd.Next(-100, 100); 
     } 

     int sum, prod, x; 

     Thread mythread1 = new Thread(delegate() { thread1(numbers, n); }); 
     Thread mythread2 = new Thread(delegate() { thread2(numbers, n); }); 
     Thread mythread3 = new Thread(() => thread3()); 
     Thread mythread4 = new Thread(delegate() { thread4(sum, prod, x); }); 

     mythread1.Start(); 
     mythread2.Start(); 
     mythread3.Start(); 
     mythread4.Start(); 
    } 
} 

}

所以，當我創建的線程，我得到了同樣的錯誤給所有的對象引用需要非靜態字段，方法或屬性「threadsproject.Program.thread < 1,2,4>（int int int）'。我在Visual Studio 2013 .net 4.6上工作。在線程上沒有很好的編程經驗，我想幫助理解我做錯了什麼。在此先感謝大家！

Answer 1

你需要學習C＃任務TPL。

using System; 
using System.Threading; 

namespace StackOverflowConsole 
{ 
    class Program 
    { 
    private static int SUM, PROD, x; 

    public static void thread1(int[] a, int n) 
    { 
     int i = n; 
     int sum = 0; 
     for (int j = 0; j < i; j++) 
     { 
      sum = a[ j ] + sum; 
     } 
     Console.WriteLine("\nThe sum is: " + sum); 
     SUM = sum; 
    } 
    public static void thread2(int[] a, int n) 
    { 
     int prod = 1; 
     for (int j = 0; j < n; j++) 
     { 
      prod = a[ j ] * prod; 
     } 
     Console.WriteLine("\nThe product is: " + prod); 
     PROD = prod; 
    } 
    public static void thread3() 
    { 
     Random rnd = new Random(); 
     int x; 
     x = rnd.Next(-1000, 1000); 
     Console.WriteLine("\nYour random number is: {0}", x); 
     Program.x = x; 
    } 
    public static void thread4(int sum, int prod, int x) 
    { 
     Console.WriteLine("\n"); 
     if (sum < prod && prod < x) 
     { 
      Console.WriteLine("T1,T2,T3"); 
     } 
     else if (sum < x && x < prod) 
     { 
      Console.WriteLine("T1,T3,T2"); 
     } 
     else if (x < sum && sum < prod) 
     { 
      Console.WriteLine("T2,T1,T3"); 
     } 
     else if (x < prod && prod < sum) 
     { 
      Console.WriteLine("T2,T3,T1"); 
     } 
     else if (prod < sum && sum < x) 
     { 
      Console.WriteLine("T3,T1,T2"); 
     } 
     else if (prod < sum && sum == x) 
     { 
      Console.WriteLine("T3,T1=T2"); 
     } 
     if (sum < prod && prod == x) 
     { 
      Console.WriteLine("T1,T2==T3"); 
     } 
     else 
      Console.WriteLine("T3,T2,T1"); 
    } 

    static void Main(string[] args) 
    { 
     Random rnd = new Random(); 
     string s; 
     int n; 

     Console.WriteLine("Give the size of the array: "); 
     s = Console.ReadLine(); 
     n = int.Parse(s); 

     int[] numbers = new int[ n ]; 

     for (int i = 0; i < n; i++) 
     { 
      numbers[ i ] = rnd.Next(-100, 100); 
     } 

     Thread mythread1 = new Thread(delegate() { thread1(numbers, n); }); 
     mythread1.Start(); 

     Thread mythread2 = new Thread(delegate() { thread2(numbers, n); }); 
     mythread2.Start(); 

     Thread mythread3 = new Thread(() => thread3()); 
     mythread3.Start(); 

     mythread1.Join(); 
     mythread2.Join(); 
     mythread3.Join(); 

     Thread mythread4 = new Thread(delegate() { thread4(SUM, PROD, x); }); 
     mythread4.Start(); 
     mythread4.Join(); 

     Console.ReadLine(); 
    } 
} 
} 

Answer 2

你需要聲明你的線程函數爲靜態functions.your線程調用內部的靜電主要方法非靜態函數