System.Int32[] c#-CodePudding

I'm trying to write code that makes a union between array a and b (AUB), but when I want to print the combined array. the console prints System.Int32\[\].

For context, if my

array a = { 1, 3, 5, 6 }

and my

array b = { 2, 3, 4, 5 }

my union array should be

combi = { 1, 2, 3, 4, 5, 6 }

but like I said, combi prints out as System.Int32\[\]

I don't know if it's the way I'm doing the union or if its the way I'm printing it. I'm also trying to do a

A intersection B and A – B

But I haven't tried anything of those yet, I would appreciate if you have any tips.

using System;
using System.Reflection.Metadata.Ecma335;

namespace HelloWorld
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("size of A? ");
            int a = Convert.ToInt32(Console.In.ReadLine());

            Console.WriteLine("Value of A:");
            int[] ans = new int[a];

            for (int i = 0; i < ans.Length; i  )
            {
                ans[i] = Convert.ToInt32(Console.In.ReadLine());
            }

            Console.WriteLine("size of B?");
            int b = Convert.ToInt32(Console.In.ReadLine());

            Console.WriteLine("Value of B:");
            int[] anse = new int[b];

            for (int i = 0; i < anse.Length; i  )
            {
                anse[i] = Convert.ToInt32(Console.In.ReadLine());
            }

            var combi = new int[ans.Length   anse.Length];

            for (int i = 0; i < combi.Length; i  )
            {
                Console.WriteLine(combi   " ");
            }

            Console.ReadLine();
        }
    }
}

CodePudding user response：

when i want to print the combined array the console prints System.Int32[]

If you write Console.Write(someObject), the method tries to find an overridden ToString in someObject. If there is none System.Object.ToString is used which just returns the fully qualified name of the type of the Object, which is "System.Int32[]" in case of an int[].

If you want to print out an array of integers one approach would be to use string.Join:

string spaceSeparatedList = string.Join(" ", combi);

Now you have a space-separated list of integers.

CodePudding user response：

In the code You have just initialized the size of the array of Combi Array not assign the values

First you have to add Array a and Array b values into combi array

Then try to print into union,see below code for the reference:

        List<int> combi = new List<int>();

        foreach(var first in ans)
        {
            combi.Add(first);
        }
        foreach (var second in anse)
        {
            combi.Add(second);
        }
        combi.Sort(); 
        string result = string.Join(",",combi);
        Console.WriteLine(result);