using System;

public class Program

{

    public static void Main()

    {

        String s;

        Console.WriteLine("enter a string");

        s=Console.ReadLine();

        int[] freq=new int[s.Length];

        char[] s1=s.ToCharArray();

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

        {

            freq[i]=1;

            for(int j=i+1;j<s.Length;j++)

            {

                if(s1[i]==s1[j])

                { 

                    freq[i]++;

                    s1[j]='0';

                }

            }

        }

        Console.WriteLine("count of char and their frequencies");

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

        {

            if(s1[i]!=' ' && s1[i]!='0')

            {

                Console.WriteLine(s1[i]+"-"+freq[i]);

            }

        }

        }

    }

​