c# i keep getting an out of bounds exception for my build stairs challenge

Question

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


namespace test
{
 /*return an array of stairs like this if i entered 2 into my argument
[
"**",
"****",
"******"
]*/


    class Program
    {


        static void Main(string[] args)
        {
             string[] TowerBuilder(int nFloors)
            { string[] tower = new string[0];
                string Stars = "";
                int i = 0;
                while (nFloors>0)
                {

                    Stars += "**" ;
                    tower[i] = Stars;
                    nFloors -=1;  // out of bounds exception here
                    i++;

                }
                return tower;
            }

            Console.WriteLine(TowerBuilder(9));
            Console.ReadLine();

        }
    }


}

Answer 1 · 2018-05-13T10:34:42Z

May 13, 2018 10:34am

Hi

You have declared bellow an array of strings of 0 size

string[] tower = new string[0];

You should declare a bigger length

string[] tower = new string[nFloors];

or use generics like lists if you wanna go dynamic

List<string> tower =new List<string>();

Also I would have declared TowerBuilder as a class method inside the Program class.

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olu adesina

olu adesina

c# i keep getting an out of bounds exception for my build stairs challenge

1 Answer

Erik Gabor

Erik Gabor