test array with c#, C#

test array with c#

//Rextester.Program.Main is the entry point for your code. Don't change it.
//Microsoft (R) Visual C# Compiler version 2.9.0.63208 (958f2354)

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

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            Char[] verificateur ( char[] tableau, int depart, int taille){
              
                if (depart <0 || taille<0 || depart+taille-1  >= tableau.Length) {
                    return null;
                }
                
                char[] SousChaine = new char[taille];
                for (int i = depart, j=0;j<taille; j++, i++){
                    SousChaine[j] = tableau[i];
                }
                
                return SousChaine;
            }
            
            char[] Alex =  new char[] {'a','b','c','x'};
            Console.WriteLine(verificateur(Alex, 1, 3));
            
        }
    }
}


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