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  1. using System;
  2.  
  3. public class Program {
  4. public static void Main() {
  5. int hora = DateTime.Now.Hour;
  6. var nome = "João";
  7. var saudacoes = new string[] { "Boa madrugada", "Bom dia", "Boa tarde", "Boa noite" };
  8. Console.WriteLine($"{saudacoes[hora / 6]} {nome}!");
  9. }
  10. }
  11.  
  12. //https://pt.stackoverflow.com/q/193243/101
Success #stdin #stdout 0.05s 17740KB
stdin
Standard input is empty
stdout
Boa noite João!