C# 字符增量

Question

我是 C# 的新手，所以这个问题（希望如此）会非常简单。

我正在尝试递增字符数组中的每个字符。这是我的代码。

        //increment each character in array
        for (int i = 0; i < text.Length; i++)
        {
            textArray[i]++; //this works
          // textArray[i] +=13; //this doesn't work 
        }

我可以将数组递增 1，但不能超过这个数。

谢谢！

如果有帮助，这是我的其余代码。

        // put all text into a string - here loosely typed as a var
        var s = System.IO.File.ReadAllText(@"C:\Users\Eliezer Feder\Documents Landers\Limudie Cholth Semester\C#\GettysburgAddress.txt");

        var upper = s.ToUpper();

        string text = ""; //empty string to add characters to it if they are indeed characters.
        foreach (char c in upper.ToCharArray())
        {
            if (Char.IsLetter(c))
            {
                text += c;
            }
        }

        //change the 'text' string to an array so can increment each individual char
        Char[] textArray = text.ToArray();

        //output old text in the char array:
        Console.WriteLine(textArray);
        Console.ReadKey();

        //increment each character in array
        for (int i = 0; i < text.Length; i++)
        {
            textArray[i]++; //this works
          // textArray[i] +=13; //this doesn't work 
        }

        Console.WriteLine(textArray);
        Console.ReadKey();

        //change back to string so can write to file:
        string lines = ""; //empty string to add characters to it if they are characters.
        foreach (char c in upper.ToCharArray())
        {
            lines += textArray[c];
        }


        System.IO.File.WriteAllLines(@"Eliezer Feder\Documents Landers\Limudie Cholth Semester\C#\encrypted.txt", lines); //THIS PART IS ALSO NOT WORKING FOR SOME REASON

Answer 1

textArray 的元素类型是 char。文字 13 的类型是 int。 char加上int的结果是int，所以不能赋值给char变量。

您必须将文字转换为 char，那么结果也将是 char:

textArray[i] += (char)13;

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