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algoritmo de verificação de palíndromos
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,82 @@ | ||
| using System; | ||
| using System.Globalization; | ||
| using System.Linq; | ||
| using System.Text; | ||
| using System.Text.RegularExpressions; | ||
|
|
||
| namespace palindromos | ||
| { | ||
| class Program | ||
| { | ||
| static void Main(string[] args) | ||
| { | ||
| if(args.Length <= 0) | ||
| { | ||
| Console.WriteLine("USO DO PROGRAMA: palindromos <sequencia para testar>!"); | ||
| return; | ||
| } | ||
| string input = args[0]; | ||
|
|
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| Console.WriteLine("CONSIDERANDO espaços, especiais e diacríticos: "); | ||
| string result = IsPalindrome(input) | ||
| ? $"'{input}' É palíndromo!" | ||
| : $"'{input}' NÃO É palíndromo."; | ||
| Console.WriteLine(result); | ||
|
|
||
| Console.WriteLine("IGNORANDO espaços, especiais e diacríticos: "); | ||
| result = IsPalindrome(input, false) | ||
| ? $"'{input}' É palíndromo!" | ||
| : $"'{input}' NÃO É palíndromo."; | ||
| Console.WriteLine(result); | ||
| } | ||
|
|
||
| // Valida se a string de entrada é palíndroma | ||
| private static bool IsPalindrome(string input, bool isSimpleWord = true) | ||
| { | ||
| bool isPalindrome = true; | ||
| // parâmetro isSimpleWord indica se validará apenas | ||
| // uma palavra ex.: "arara" ou se é frase e portanto | ||
| // deve usar regras de espaços e diacríticos | ||
| if(!isSimpleWord) | ||
| { | ||
| // remove os espaços e especiais | ||
| // e os diacríticos | ||
| input = Regex.Replace(input, @"\W+", string.Empty); | ||
| input = RemoveDiacritics(input); | ||
| } | ||
| // garantindo o ignoreCase | ||
| input = input.ToUpper(); | ||
| int halfLengthIndex = input.Length / 2 - 1; | ||
| int lastIndex = input.Length - 1; | ||
| // vai até a metade da string | ||
| for(int index=0; index< halfLengthIndex; index++) | ||
| { | ||
| // compara o caractrer no primeiro indice com o ultimo | ||
| // o segundo com o penultimo, etc | ||
| // se encontrar alguma coisa diferente, já pode retornar falso | ||
| if(input[index] != input[lastIndex-index]) | ||
| { | ||
| isPalindrome = false; | ||
| break; | ||
| } | ||
|
|
||
| } | ||
| return isPalindrome; | ||
| } | ||
|
|
||
| // método para "limpar" a string de diacríticos | ||
| // ps.: já havia utilizado anteriormente em produção | ||
| // -- fonte: https://stackoverflow.com/a/13155469 | ||
| private static string RemoveDiacritics(string str) | ||
| { | ||
| if (null == str) return null; | ||
| var chars = str | ||
| .Normalize(NormalizationForm.FormD) | ||
| .ToCharArray() | ||
| .Where(c=> CharUnicodeInfo.GetUnicodeCategory(c) != UnicodeCategory.NonSpacingMark) | ||
| .ToArray(); | ||
|
|
||
| return new string(chars).Normalize(NormalizationForm.FormC); | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,8 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
|
|
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| <PropertyGroup> | ||
| <OutputType>Exe</OutputType> | ||
| <TargetFramework>netcoreapp3.1</TargetFramework> | ||
| </PropertyGroup> | ||
|
|
||
| </Project> |