using System;

​

int[] createIntArray(int size) {

    // Declare a single-dimensional array

    int[] array = new int[size];

    // Appends values to an array

    Random rnd = new Random();

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

        array[i] = rnd.Next(100, 999);

    }

    return array;

}

​

double[] createDoubleArray(int size) {

    // Declare a single-dimensional array

    double[] array = new double[size];

    // Appends values to an array

    Random rnd = new Random();

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

        array[i] = Math.Round(rnd.NextDouble(), 3);

    }

    return array;

}

​

void countEvenNUmbers(int[] array) {

    int count = 0;

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

        if (array[i] % 2 == 0) count++;

    }

    if (count == 0)

        Console.WriteLine("There are no even numbers");

    else if (count == 1)

        Console.WriteLine("There is 1 even number");

    else

        Console.WriteLine("There are {0} even numbers", count);

}

​

void sumOddNUmbers(int[] array) {

    int sum = 0;

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

        if (i % 2 != 0) sum += array[i];

    }

    Console.WriteLine("Sum of odd numbers is {0}", sum);

}

​

void sumDoubleArray(double[] array) {

    double sum = 0;

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

        sum += array[i];

    }

    Console.WriteLine("Sum numbers of array is {0}", sum);

}

​

/* create arrays and put them to console */

int[] myIntArray = createIntArray(4);

Console.WriteLine("My integer array is: [{0}]", string.Join(", ", myIntArray));

double[] myDoubleArray = createDoubleArray(4);

Console.WriteLine("My double array is: [{0}]", string.Join(", ", myDoubleArray));

​

/* the first task */

countEvenNUmbers(myIntArray);

/* the second task */

sumOddNUmbers(myIntArray);

/* the last one */

sumDoubleArray(myDoubleArray);