simultQ, C# - rextester

simultQ

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

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

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            //Your code goes here
            
            int[] a = simult(new int[] {4,2,20}, new int[] {7,-3,9});
            //Console.WriteLine(simult(new int[] {4,2,20}, new int[] {7,-3,9}));
            
            //Console.WriteLine(a[0]);
            //Console.WriteLine(a[1]);
            
            simultQ();
            //Console.WriteLine(simult(new int[] {1,2,3}, new int[] {2,5,5})[1]);
        }
        
        public static int[] simult(int[] c, int[] d) {
            
            int x,y;
           //int[] c = new int[3];
           //int[] d = new int[3];
            if(c.Length != 3 && d.Length!=3)
               throw new ArgumentException("array should be int[3]");
            
            y = (c[0]*d[2]-d[0]*c[2] ) / (c[0]*d[1]-d[0]*c[1]);
            x = (c[2]-c[1]*y)/c[0];
            
            int[] z = new int[] {x,y};
            //Console.WriteLine("x = {0}, y = {1}",x,y); 
            return z;
        }
        
        public static void simultQ() {
            
            int[] c = new int[6];
            int count = 0;
            while (count <100 ) {
            
                for (int i = 0; i<c.Length; i++) {

c[i] = Rand.Next(1,10);
                }

if (c[0]*c[4]!=c[3]*c[1]) {

int[] result = simult(new int[] {c[0], c[1], c[2]}, new int[] {c[3], c[4], c[5]});
                    
                    if (Math.Abs(result[0]*result[1])<400 && result[0]%1==0 && result[1]%1==0 && result[0]+result[1]!=0 && result[0]*result[1]!=0) {
                
                        count++;
                        Console.WriteLine("{0}x + {1}y = {2}", c[0], c[1], c[2]);
                        Console.WriteLine("{0}x + {1}y = {2}", c[3], c[4], c[5]);
                        Console.WriteLine("x = {0}, y = {1}", result[0], result[1]);
                        Console.WriteLine();
                    }
                }
                
                
            } 
            Console.WriteLine(count);
        }
        
        
    }
    
    public static class Rand
    { 
        /// <summary> 
        /// Random number generator used to generate seeds, 
        /// which are then used to create new random number 
        /// generators on a per-thread basis. 
        /// </summary> 
        private static readonly Random globalRandom = new Random(); 
        private static readonly object globalLock = new object();

/// <summary> 
        /// Random number generator 
        /// </summary> 
        private static readonly ThreadLocal<Random> threadRandom = new ThreadLocal<Random>(NewRandom);

/// <summary> 
        /// Creates a new instance of Random. The seed is derived 
        /// from a global (static) instance of Random, rather 
        /// than time. 
        /// </summary> 
        public static Random NewRandom() 
        { 
            lock (globalLock) 
            { 
                return new Random(globalRandom.Next()); 
            } 
        }

/// <summary> 
        /// Returns an instance of Random which can be used freely 
        /// within the current thread. 
        /// </summary> 
        public static Random Instance { get { return threadRandom.Value; } }

/// <summary>See <see cref="Random.Next()" /></summary> 
        public static int Next() 
        { 
            return Instance.Next(); 
        }

/// <summary>See <see cref="Random.Next(int)" /></summary> 
        public static int Next(int maxValue) 
        { 
            return Instance.Next(maxValue); 
        }

/// <summary>See <see cref="Random.Next(int, int)" /></summary> 
        public static int Next(int minValue, int maxValue) 
        { 
            return Instance.Next(minValue, maxValue); 
        }

/// <summary>See <see cref="Random.NextDouble()" /></summary> 
        public static double NextDouble() 
        { 
            return Instance.NextDouble(); 
        }

/// <summary>See <see cref="Random.NextBytes(byte[])" /></summary> 
        public static void NextBytes(byte[] buffer) 
        { 
            Instance.NextBytes(buffer); 
        } 
        
        public static double NextD(double minValue, double maxValue) {
            
            return Instance.NextDouble()*(maxValue-minValue)+minValue;
        }
    } 
}

Show compiler warnings [ + ] Show input
Compilation time: 0,12 sec, absolute running time: 0,13 sec, cpu time: 0,08 sec, average memory usage: 15 Mb, average nr of threads: 3

9x + 3y = 1 7x + 3y = 7 x = -2, y = 9 2x + 3y = 7 4x + 8y = 2 x = 12, y = -6 3x + 5y = 7 6x + 7y = 4 x = -2, y = 3 4x + 6y = 8 3x + 4y = 2 x = -10, y = 8 4x + 2y = 3 7x + 4y = 1 x = 4, y = -8 1x + 2y = 3 3x + 3y = 6 x = 1, y = 1 1x + 7y = 8 8x + 5y = 8 x = 1, y = 1 5x + 6y = 5 4x + 6y = 2 x = 2, y = -1 8x + 2y = 1 6x + 2y = 7 x = -2, y = 12 5x + 8y = 2 3x + 4y = 2 x = 2, y = -1 7x + 5y = 8 6x + 4y = 1 x = -13, y = 20 4x + 4y = 6 6x + 9y = 5 x = 2, y = -1 1x + 6y = 7 5x + 9y = 3 x = 1, y = 1 8x + 1y = 9 1x + 4y = 6 x = 1, y = 1 7x + 3y = 8 4x + 2y = 7 x = -2, y = 8 5x + 1y = 8 9x + 5y = 3 x = 2, y = -3 2x + 7y = 1 2x + 6y = 5 x = 14, y = -4 8x + 6y = 3 9x + 7y = 5 x = -4, y = 6 3x + 2y = 6 8x + 3y = 1 x = -2, y = 6 2x + 5y = 4 1x + 1y = 8 x = 12, y = -4 2x + 7y = 2 2x + 3y = 6 x = 4, y = -1 4x + 5y = 9 9x + 7y = 7 x = -1, y = 3 5x + 1y = 7 2x + 2y = 7 x = 1, y = 2 2x + 3y = 3 4x + 8y = 4 x = 3, y = -1 5x + 7y = 9 1x + 2y = 8 x = -12, y = 10 5x + 9y = 2 4x + 7y = 4 x = 22, y = -12 4x + 4y = 5 3x + 4y = 1 x = 3, y = -2 1x + 2y = 5 7x + 4y = 3 x = -1, y = 3 5x + 6y = 2 2x + 3y = 9 x = -15, y = 13 3x + 7y = 4 4x + 9y = 2 x = -22, y = 10 4x + 9y = 7 2x + 3y = 8 x = 8, y = -3 9x + 7y = 2 4x + 5y = 5 x = -1, y = 2 1x + 4y = 7 3x + 3y = 6 x = 3, y = 1 7x + 7y = 3 2x + 4y = 6 x = -1, y = 2 3x + 3y = 5 7x + 5y = 5 x = -1, y = 3 5x + 4y = 2 2x + 2y = 8 x = -14, y = 18 9x + 6y = 4 5x + 2y = 6 x = 1, y = -2 3x + 8y = 3 1x + 2y = 3 x = 9, y = -3 5x + 8y = 4 2x + 1y = 6 x = 4, y = -2 1x + 1y = 7 5x + 8y = 3 x = 17, y = -10 1x + 7y = 8 7x + 4y = 7 x = 1, y = 1 6x + 8y = 5 3x + 6y = 7 x = -1, y = 2 9x + 1y = 6 4x + 1y = 1 x = 1, y = -3 5x + 6y = 5 1x + 1y = 2 x = 7, y = -5 2x + 4y = 6 9x + 5y = 1 x = -1, y = 2 3x + 1y = 5 7x + 2y = 4 x = -6, y = 23 1x + 7y = 9 1x + 5y = 2 x = -12, y = 3 6x + 6y = 6 5x + 6y = 7 x = -1, y = 2 1x + 6y = 9 7x + 3y = 2 x = 3, y = 1 8x + 7y = 6 3x + 2y = 9 x = 9, y = -10 7x + 9y = 1 4x + 6y = 4 x = -5, y = 4 2x + 1y = 7 7x + 2y = 6 x = -2, y = 12 3x + 7y = 9 2x + 8y = 1 x = 5, y = -1 6x + 6y = 4 8x + 7y = 1 x = -3, y = 4 4x + 8y = 8 3x + 5y = 1 x = -8, y = 5 5x + 3y = 7 8x + 6y = 5 x = 4, y = -5 4x + 1y = 9 2x + 1y = 4 x = 2, y = -1 3x + 2y = 7 5x + 5y = 7 x = 3, y = -2 4x + 2y = 1 1x + 3y = 9 x = -1, y = 3 9x + 5y = 1 8x + 6y = 6 x = -1, y = 3 2x + 9y = 9 1x + 1y = 8 x = 9, y = -1 3x + 2y = 9 4x + 8y = 1 x = 4, y = -2 1x + 4y = 9 8x + 8y = 9 x = 1, y = 2 5x + 2y = 8 7x + 7y = 4 x = 2, y = -1 9x + 6y = 3 7x + 4y = 6 x = 3, y = -5 5x + 5y = 8 7x + 5y = 1 x = -3, y = 5 3x + 1y = 7 7x + 9y = 4 x = 2, y = -1 4x + 3y = 9 8x + 7y = 5 x = 12, y = -13 4x + 4y = 4 7x + 9y = 3 x = 3, y = -2 1x + 1y = 8 2x + 9y = 8 x = 9, y = -1 8x + 4y = 5 8x + 2y = 9 x = 1, y = -2 6x + 6y = 5 9x + 7y = 1 x = -2, y = 3 2x + 3y = 6 1x + 3y = 5 x = 1, y = 1 6x + 4y = 8 9x + 7y = 4 x = 6, y = -8 4x + 5y = 7 2x + 2y = 8 x = 13, y = -9 3x + 2y = 6 3x + 4y = 2 x = 3, y = -2 4x + 3y = 7 8x + 9y = 9 x = 2, y = -1 5x + 9y = 1 1x + 1y = 1 x = 2, y = -1 2x + 6y = 8 7x + 5y = 2 x = 1, y = 1 4x + 6y = 3 3x + 3y = 5 x = 2, y = -1 8x + 6y = 7 5x + 3y = 8 x = 3, y = -4 8x + 3y = 4 3x + 2y = 6 x = -1, y = 5 3x + 4y = 9 4x + 3y = 4 x = -1, y = 3 5x + 7y = 8 3x + 3y = 6 x = 3, y = -1 3x + 4y = 1 5x + 6y = 5 x = 7, y = -5 8x + 3y = 2 4x + 1y = 7 x = 4, y = -12 5x + 5y = 6 7x + 9y = 4 x = 3, y = -2 6x + 6y = 9 4x + 9y = 1 x = 2, y = -1 7x + 2y = 6 5x + 1y = 8 x = 3, y = -8 1x + 4y = 6 2x + 5y = 1 x = -6, y = 3 2x + 5y = 3 3x + 6y = 1 x = -3, y = 2 5x + 4y = 4 2x + 1y = 8 x = 8, y = -10 7x + 3y = 5 1x + 1y = 5 x = -2, y = 7 1x + 3y = 8 1x + 2y = 2 x = -10, y = 6 6x + 6y = 5 8x + 7y = 2 x = -3, y = 4 9x + 2y = 8 6x + 3y = 1 x = 1, y = -2 6x + 9y = 4 3x + 4y = 6 x = 12, y = -8 2x + 1y = 9 2x + 4y = 2 x = 5, y = -2 1x + 4y = 5 5x + 7y = 2 x = 1, y = 1 1x + 8y = 9 9x + 3y = 3 x = 1, y = 1 100