using System;
using System.Linq;
using System.Collections.Generic;
public class TopNWords
{
static string RemoveWord(string str, string word) {
string[] words = str.ToLower().Split(new[] { ' ', ',', '.', ';', ':', '!', '?' }, StringSplitOptions.RemoveEmptyEntries);
string newStr = "";
foreach (string s in words) {
if (!s.Equals(word)) {
newStr += s + " ";
}
}
return newStr.Trim();
}
public static Dictionary<string, long> GetTopNWords(string str, int n) {
// Exclude stop words (commonly used words)
str = RemoveWord(str, "is");
str = RemoveWord(str, "a");
str = RemoveWord(str, "to");
str = RemoveWord(str, "as");
str = RemoveWord(str, "can");
str = RemoveWord(str, "that");
str = RemoveWord(str, "on");
str = RemoveWord(str, "and");
// Split the string into words
string[] words = str.ToLower().Split(new[] { ' ', ',', '.', ';', ':', '!', '?' }, StringSplitOptions.RemoveEmptyEntries);
// Count the occurrences of each word
var wordCount = words.GroupBy(word => word)
.ToDictionary(g => g.Key, g => (long)g.Count());
// Sort the words by their occurrences and get the top N words
return wordCount.OrderByDescending(kvp => kvp.Value)
.ThenBy(kvp => kvp.Key)
.Take(n)
.ToDictionary(kvp => kvp.Key, kvp => kvp.Value);
}
public static void Main(string[] args)
{
string str = "C# is a general-purpose high-level programming language " +
"supporting multiple paradigms. C# encompasses static typing " +
"strong typing, lexically scoped, imperative, declarative, " +
"functional, generic, object-oriented class-based, and " +
"component-oriented programming disciplines.";
int n = 5;
var topNWords = GetTopNWords(str, n);
foreach (var kvp in topNWords) {
Console.WriteLine(kvp.Key);
}
}
}
/*
run:
c#
programming
typing
class-based
component-oriented
*/