How can I stop string repeats? How can I pass the method three random string messages?

Question

class Program
{
    static void Main(string[] args)
    {
        //array of strings
        string[] phrases = { "Buy it today", "You won't regret your purchase", "Satisfaction is guaranteed", "Purchase of a lifetime", "Such a great deal", "Limited time only" };
        Random r = new Random();
        string random = phrases[r.Next(0, 5)];
        string random2 = phrases[r.Next(0, 5)];
        string random3 = phrases[r.Next(0, 5)];

        RanStrings(random, random2, random3);
    }

    private static void RanStrings(string random, string random2, string random3)
    {
        Console.WriteLine(random);
        Console.WriteLine(random2);
        Console.WriteLine(random3);
    }
}

Please tag your question with the language (Java?). And you need to explain your question, not just post a bunch of code. — Barmar, Sep 18 '14 at 18:16
[Shuffle](http://stackoverflow.com/questions/273313/randomize-a-listt-in-c-sharp) and `Take(3)`? — crashmstr, Sep 18 '14 at 18:44

score 0 · Answer 1 · answered Sep 18 '14 at 18:37

your question is not very clear, but according to my understanding, you need a method to check equlity like:

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

namespace FormLetter
{
    class Program
    {

        static void Main(string[] args)
        {
            string random="";
            string random2 ="";
            string random3 ="";
         do{
            //array of strings
            string[] phrases = { "Buy it today", "You won't regret your purchase", "Satisfaction is                   guaranteed", "Purchase of a lifetime", "Such a great deal", "Limited time only" };
            Random r = new Random();
            random = phrases[r.Next(0, 5)];
            random2 = phrases[r.Next(0, 5)];
            random3 = phrases[r.Next(0, 5)];
           }while(compareStrings(random,random2, random3))

            RanStrings(random, random2, random3);
        }

        private static void RanStrings(string random, string random2, string random3)
        {
            Console.WriteLine(random);
            Console.WriteLine(random2);
            Console.WriteLine(random3);
        }
        private static bool compareStrings(string random, string random2, string random3)
        {
            //put here your comparison code
            if (there is equality between 2 strings passed in argument)
            return true;
            else  return false;
        }
    }
}

score 0 · Answer 2 · answered Sep 18 '14 at 18:45

It sounds like you want to "shuffle" the strings rather than picking one at random (essentially random selection without replacement). If that's the case just use an OrderBy with a random number:

Random r = new Random();

string[] phrases = { "Buy it today", "You won't regret your purchase", "Satisfaction is guaranteed", "Purchase of a lifetime", "Such a great deal", "Limited time only" };
phrases = phrases.OrderBy(s => r.Next()).ToArray();

// now just take the "first" 3    

RanStrings(phrases[0], phrases[1], phrases[2]);

How can I stop string repeats? How can I pass the method three random string messages?

2 Answers2