Generic type array get and set in C# , how to make it work?


getting error While executing the code below in C#

using System;
using System.Collections.Generic;
namespace GenericApplication {
 public class MyGenericApplication < T > {
  private T[] array;public static MyGenericArray(int size) {
   return MyGenericArray[size];
  }
  public T getItem(int index) {
   return array[index];
  }
  public void setItem(int index, T value) {
   return array[index] = value;
  }
 }
 class tester {
  public static void Main(string[] args) {
   MyGenericArray < int > intArray = new MyGenericArray < int > (5);
   for (int c = 0; c < 5; c++) {
    setItem(c, c * 5);
   }
   for (int c = 0; c < 5; c++) {
    Write(intArray.getItem(c) + " ");
   }
   WriteLine();
   MyGenericArray < char > charArray = new MyGenericArray < char > (5);
   for (int c = 0; c < 5; c++) {
    setItem(c, (char)(c + 97));
   }
   for (int c = 0; c < 5; c++) {
    Write(charArray.getItem(c) + " ");
   }
   WriteLine();
  }
 }
}

main.cs(10,19): error CS1520: Class, struct, or interface method must have a return type


Asked by:- Pa
0
: 349 At:- 11/10/2017 12:29:41 PM
C# generic-type-array array-get-set-value-in-C#

Please, ask the question properly, do not just write help beginner and copy-pasting code is enough, mention what you were trying to achieve, where you got error and code in correct format, i have edited for you, as much as i understand, do not change question details again, thanks 0
By : vikas_jk - at :- 11/10/2017 1:02:03 PM





1 Answers
profileImage Answered by:- bhanu

Your code had lots of issues, here is the correct code, with explanation in comments, you are using generic type data to inittialize , set and get values of arrays

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

namespace ConsoleApp1
{
    
    class tester
    {
        public static void Main(string[] args)
        {
            //Initialize array of int type
            MyGenericArray<int> intArray = new MyGenericArray<int>(5);
            //Set items in array one bye one by loop
            for (int c = 0; c < 5; c++)
            {
                intArray.setItem(c, c * 5);
            }

            //Get Items of Array set in above steps
            for (int c = 0; c < 5; c++)
            {
              Console.Write(intArray.getItem(c) + " ");
            }
            Console.WriteLine();
            //repeat above steps again using char type instead of int
            MyGenericArray<char> charArray = new MyGenericArray<char>(5);
            for (int c = 0; c < 5; c++)
            {
                charArray.setItem(c, (char)(c + 97));
            }
            for (int c = 0; c < 5; c++)
            {
                Console.Write(charArray.getItem(c) + " ");
            }
            Console.WriteLine();
        }    

        //Create private class of generic type
        private class MyGenericArray<T>
        {
            private int v;
            private T[] array= new T[5];


            //set the Generic type array length
            public MyGenericArray(int v)
            {
                this.v = v;
            }

            //get array items
            public T getItem(int index)
            {
                return array[index];
            }

            //set array items, at Index for example 1, where value = value of type T(int, char)
            public T setItem(int index, T value)
            {
                //example array[0]=0
                //array [1]=5
                //array [2]=10
                return array[index] =value;
            }
        }
    }
}
    

try this link

1
At:- 11/10/2017 1:52:44 PM
great work, I see it is working now, using link provided in answer 0
By : pika - at :- 11/15/2017 7:55:40 AM
Thanks a ton!!! 0
By : Pa - at :- 11/15/2017 9:58:30 AM





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