Question

循环会在整个单词范围内重复输出。

我尝试在循环的内部和外部启动console.write。我还尝试更改了增量子和子字符串的值。

 Console.WriteLine("Enter a word.");
            string userWord = Console.ReadLine();
            Console.WriteLine();
            Console.WriteLine("You wrote {0}", userWord);
            Console.WriteLine();

            userWord.ToLower();
            char[] wordArray = userWord.ToArray();


            for (int i = 0; i <= wordArray.Length; i++)
            {
                string theLetter = userWord.Substring(i, 1);

                //theLetter = theLetter.ToLower();
                string rebuilt = new string(wordArray);

                if (wordArray[i] == 'a' || wordArray[i] == 'e' || wordArray[i] == 'i' || wordArray[i] == 'o' || wordArray[i] == 'u')
            {
                    wordArray[i] = '$';

                }


                Console.WriteLine("Your word is now: {0}", rebuilt);
                Console.WriteLine("The total number of letters in your word is {0}", userWord.Length);
            }
            Console.ReadLine();

console.write应该只显示一次输出。

Answer 1

您需要将Console.WriteLine移动到循环之外。另外，您需要更改循环条件以避免ArguementOutOfRangeException。

sudo apt update

您的代码中还有一个错误。您正在将userWord转换为小写，但没有存储结果。

for (int i = 0; i < wordArray.Length; i++)

以上行需要替换为

userWord.ToLower();

完整代码

userWord = userWord.ToLower();

仅供参考，您也可以使用Regex实现相同的目的。

Console.WriteLine("Enter a word.");
string userWord = Console.ReadLine();
Console.WriteLine();
Console.WriteLine("You wrote {0}", userWord);
Console.WriteLine();

userWord = userWord.ToLower();
char[] wordArray = userWord.ToArray();

for (int i = 0; i < wordArray.Length; i++)
{
        if (wordArray[i] == 'a' || wordArray[i] == 'e' || wordArray[i] == 'i' || wordArray[i] == 'o' || wordArray[i] == 'u')
        {
            wordArray[i] = '$';

        }
 }

var rebuildWord = new string(wordArray);
Console.WriteLine("Your word is now: {0}", rebuildWord);
Console.WriteLine("The total number of letters in your word is {0}", userWord.Length);

Answer 2

这很简单。您应该在打印之前检查循环是否在最终迭代中。

 Console.WriteLine("Enter a word.");
        string userWord = Console.ReadLine();
        Console.WriteLine();
        Console.WriteLine("You wrote {0}", userWord);
        Console.WriteLine();

        userWord.ToLower();
        char[] wordArray = userWord.ToArray();


        for (int i = 0; i <= wordArray.Length; i++)
        {
            string theLetter = userWord.Substring(i, 1);

            //theLetter = theLetter.ToLower();
            string rebuilt = new string(wordArray);

            if (wordArray[i] == 'a' || wordArray[i] == 'e' || wordArray[i] == 'i' || wordArray[i] == 'o' || wordArray[i] == 'u')
            {
                wordArray[i] = '$';

            }
            if(i==userWord.Length)
            {
            Console.WriteLine("Your word is now: {0}", rebuilt);
            Console.WriteLine("The total number of letters in your word is {0}", userWord.Length);
            }
        }
        Console.ReadLine();

我如何在使用子字符串时获得for循环仅显示输出一次

2 个答案: