Array: partial filling-CodePudding

For a school assignment, I need to write a program where a user types two integers (which represents indexes) and then a method generates random numbers between those two numbers. For example: if a user types 3 and 8 and array length is 15 then a method will generate random numbers between index 3 and index 8 in an array. I'm trying something like this but it's not working:

        int[] arry = new int[15];

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

        Filling(a, b, arry);

        static void Filling(int a, int b, int[] arry)
        {
            Random rnd = new Random();

            for (int i = arry[a]; i < arry[b]; i  )
            {
                arry[i] = rnd.Next(3, 31);
                Console.WriteLine(arry[i]);
            }
        }

CodePudding user response：

As mentioned in the comments, you want the loop to iterate between a and b. Not between the values stored in the array for a and b. i.e.

        for (int i = a; i < b; i  )
        {
            arry[i] = rnd.Next(3, 31);
            Console.WriteLine(arry[i]);
        }

You might also want to add some bounds-checking to ensure that a and b are valid. This can be done by clamping the index values before entering the loop.

        a = Math.Max(a, 0);
        b = Math.Min(b, arry.Count);