yield IEnumerator : IEnumerator « Class Interface « C# / C Sharp

1. C# / C Sharp
2. Class Interface
3. IEnumerator

yield IEnumerator

 



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


public class Primes {
    private long min;
    private long max;

    public Primes(long minimum, long maximum) {
        min = minimum;
        max = maximum;
    }

    public IEnumerator GetEnumerator() {
        for (long possiblePrime = min; possiblePrime <= max; possiblePrime++) {
            bool isPrime = true;
            for (long possibleFactor = 2; possibleFactor <= (long)Math.Floor(Math.Sqrt(possiblePrime)); possibleFactor++) {
                long remainderAfterDivision = possiblePrime % possibleFactor;
                if (remainderAfterDivision == 0) {
                    isPrime = false;
                    break;
                }
            }
            if (isPrime) {
                yield return possiblePrime;
            }
        }
    }
}

class Program {
    static void Main(string[] args) {
        Primes primesFrom2To1000 = new Primes(2, 1000);
        foreach (long i in primesFrom2To1000)
            Console.Write("{0} ", i);
    }
}

 

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