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C# why is it skipping my console.readline()?

开发者 https://www.devze.com 2023-01-17 12:06 出处:网络
So the program is working correctly, but for some reason, on the second time through, it is skipping the Console.ReadLine() prompt altogether. I ran through debug and confirmed that it isn\'t a loop p

So the program is working correctly, but for some reason, on the second time through, it is skipping the Console.ReadLine() prompt altogether. I ran through debug and confirmed that it isn't a loop problem as it is actually entering the method, displaying the WriteLine then completely skipping over the ReadLine, thus returning a blank back to Main() causing it to exit. What the deuce? Any ideas?

here is the code.

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace LAB4B
{
    class Program
    {
        static void Main(string[] args)
        {
            string inString;
            ArrayList translatedPhrase = new ArrayList();

            DisplayInfo();
            GetInput(out inString);

            do
            {
                GetTranslation(inString, translatedPhrase);
                DisplayResults(inString, translatedPhrase);
                GetInput(out inString);
            } while (inString != "");

        }

        static void DisplayInfo()
        {
            Console.WriteLine("*** You will be prompted to enter a string of  ***");
            Console.WriteLine("*** words. The string will be converted into ***");
            Console.WriteLine("*** Pig Latin and the results displayed. **开发者_开发技巧*");
            Console.WriteLine("*** Enter as many strings as you would like. ***");
        }

        static void GetInput(out string words)
        {

            Console.Write("\n\nEnter a group of words or ENTER to quit: ");
            words = Console.ReadLine();            
        }

        static void GetTranslation(string originalPhrase, ArrayList translatedPhrase)
        {
            int wordLength;                       
            string[] splitPhrase = originalPhrase.Split();

            foreach (string word in splitPhrase)
            {
                wordLength = word.Length;
                translatedPhrase.Add(word.Substring(1, wordLength - 1) + word.Substring(0, 1) + "ay");
            }          




        }

        static void DisplayResults(string originalString, ArrayList translatedString)
        {
            Console.WriteLine("\n\nOriginal words: {0}", originalString);
            Console.Write("New Words: ");
            foreach (string word in translatedString)
            {
                Console.Write("{0} ", word);
            }

            Console.Read();
        }

    }
}


It's because of your Console.Read() call in DisplayResults method. It generally reads just one character. If you press ENTER (which is actually combination of 2 characters - carriage return and line feed) on Console.Read() it only gets carriage return character, and line feed gets to your next console reading method - Console.ReadLine() in GetInput() method. Since line feed character is also a linux ENTER character, Console.ReadLine() reads it as one line.


Try changing the Console.Read() in your DisplayResults method to Console.ReadLine(). That seems to make everything behave as it should.


You said the second time round. Looking at your do-while loop, That would fall through because your variable inString is initialised and not empty.

Btw, usually safer to use

do
{
} while (!String.IsNullOrEmpty(inString));

than to directly compare to an empty string.

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