reading two integers in one line using C#

Question

i know how to make a console read two integers but each integer by it self like this

int a = int.Parse(Console.ReadLine());
int b = int.Parse(Console.ReadLine());

if i entered two numbers, i.e (1 2), the value (1 2), cant be parse to integers what i want is if i entered 1 2 then it will take it as two integers

Answer 1

public static class ConsoleInput
{
    public static IEnumerable<int> ReadInts()
    {
        return SplitInput(Console.ReadLine()).Select(int.Parse);
    }

    private static IEnumerable<string> SplitInput(string input)
    {
        return Regex.Split(input, @"\s+")
                    .Where(x => !string.IsNullOrWhiteSpace(x));
    }
}

Answer 2

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

namespace SortInSubSet
{
    class Program
    {

        static int N, K;
        static Dictionary<int, int> dicElements = new Dictionary<int, int>();
        static void Main(string[] args)
        {

            while (!ReadNK())
            {
                Console.WriteLine("***************** PLEASE RETRY*********************");
            }

            var sortedDict = from entry in dicElements orderby entry.Key/3 , entry.Value ascending select entry.Value;

            foreach (int ele in sortedDict)
            {
                Console.Write(ele.ToString() + "  ");
            }

            Console.ReadKey();
        }

        static bool ReadNK()
        {
            dicElements = new Dictionary<int, int>();
            Console.WriteLine("Please entere the No. of element 'N' ( Between 2 and 9999) and Subset Size 'K' Separated by space.");

            string[] NK = Console.ReadLine().Split();

            if (NK.Length != 2)
            {
                Console.WriteLine("Please enter N and K values correctly.");
                return false;
            }

            if (int.TryParse(NK[0], out N))
            {
                if (N < 2 || N > 9999)
                {
                    Console.WriteLine("Value of 'N' Should be Between 2 and 9999.");
                    return false;
                }
            }
            else
            {
                Console.WriteLine("Invalid number: Value of 'N' Should be greater than 1 and lessthan 10000.");
                return false;
            }

            if (int.TryParse(NK[1], out K))
            {
                Console.WriteLine("Enter all elements Separated by space.");
                string[] kElements = Console.ReadLine().Split();

                for (int i = 0; i < kElements.Length; i++)
                {
                    int ele;

                    if (int.TryParse(kElements[i], out ele))
                    {
                        if (ele < -99999 || ele > 99999)
                        {
                            Console.WriteLine("Invalid Range( " + kElements[i] + "): Element value should be Between -99999 and 99999.");
                            return false;
                        }

                        dicElements.Add(i, ele);
                    }
                    else
                    {
                        Console.WriteLine("Invalid number( " + kElements[i] + "): Element value should be Between -99999 and 99999.");
                        return false;
                    }

                }

            }
            else
            {
                Console.WriteLine(" Invalid number ,Value of 'K'.");
                return false;
            }


            return true;
        }
    }
}

Answer 3

You need something like (no error-checking code)

var ints = Console
            .ReadLine()
            .Split()
            .Select(int.Parse);

This reads a line, splits on whitespace and parses the split strings as integers. Of course in reality you would want to check if the entered strings are in fact valid integers (int.TryParse).

Answer 4

string x;
int m;
int n;

Console.WriteLine("Enter two no's seperated by space: ");

x = Console.ReadLine();
m = Convert.ToInt32(x.Split(' ')[0]);
n = Convert.ToInt32(x.Split(' ')[1]);

Console.WriteLine("" + m + " " + n);

This Should work as per your need!

Answer 5

int a, b;
string line = Console.ReadLine();
string[] numbers= line.Split(' ');
a = int.Parse(numbers[0]);
b = int.Parse(numbers[1]);

Answer 6

Then you should first store it in a string and then split it using the space as token.