C# program to reverse each word of a sentence separately?

Question

a C# program to reverses each word in a sentence except these punctuation marks (? ! . ,)

example: (input) this is john, who are you?

(output) sith si nhon, ohw era uoy?
_______________________________________...
here's my code which reverses punctuation marks too and removes the space character in the output.. :,(

string str = Console.ReadLine();
string strrev = "";

foreach (var word in str.Split(' '))
{
string temp = "";
foreach (var ch in word.ToCharArray())
{
temp = ch + temp;
}
strrev = strrev + temp + "";
}
Console.WriteLine(strrev);
Console.ReadLine();

TALLURI RAJESH · Answer

Here is the another way to implement with out using any predefiened functions. Console.WriteLine(Enter a string: ); string str = Console.ReadLine(); string strrev = ; string temp = ; foreach (char ch in str) { if (ch != ' ') { temp = ch + temp; } else { strrev = strrev + temp +  ; temp = ; } } strrev = strrev + temp +  ; Console.WriteLine(strrev); Console.ReadLine();

Vulpes · Answer

If you don't want to reverse those 4 particular punctuation marks then a couple more tweaks will be needed: char[] punc = .?!.ToCharArray(); string str = Console.ReadLine(); string strrev = ; foreach (var word in str.Split(' ')) { string temp = ; foreach (var ch in word.ToCharArray()) { if (Array.IndexOf(punc ch) == -1) temp = ch + temp; else temp = temp + ch; } strrev = strrev + temp +  ; } Console.WriteLine(strrev); Console.ReadLine();

akshat goel · Answer

you can also use char.IsPunctuation(ch) to find the punctuation... Here is the implementation.. string s = sxrdct?fvzguhbij.; var sb = new StringBuilder(); foreach (char c in s) { if (!char.IsPunctuation(c)) sb.Append(c); } s = sb.ToString();

akshat goel · Answer

Here is a small tweak I did and the code worked... string str = Console.ReadLine(); string strrev = ; foreach (var word in str.Split(' ')) { string temp = ; foreach (var ch in word.ToCharArray()) { temp = ch + temp; } strrev = strrev + temp +  ; //Just added a space } Console.WriteLine(strrev); Console.ReadLine(); The code best works when there is a space before and after punctuation mark..If the punctuation mark is immediately after the word then after reverse it appears first... And in case you want to detect the punctuation in the last char You would need to make a switch case in foreach loop for ch. That would make the code dirty so skipped it...