控制台在console.read（）之后终止，即使最后使用console.readline（）也是如此 [英] Console terminates after console.read(), even with console.readline() at the end

问题描述

以下代码要求您提供姓名和姓氏。

The following code asks for your name and surname.

class Program
{
        static void Main(string[] args)
        {
            Console.Write("Enter your name: ");
            string s = Console.ReadLine();
            Console.WriteLine("Your name: " + s);
            Console.Write("Enter your surname: ");
            int r = Console.Read();
            Console.WriteLine("Your surname: " + r);

            Console.ReadLine();
        }
}

输入名称后，程序会成功显示您的输入。但是，输入姓氏后，程序立即停止。根据我的理解，Console.Read（）应该返回我输入的字符串的第一个字符的int值（ASCII码？）。



为什么程序终止就在Console.Read（）之后？ Console.ReadLine（）不应该确保程序保持打开状态吗？



我尝试过：



如果我使用字符串r = Console.ReadLine（）;

那么它运作良好。

After entering the name, the program successfully displays your input. However, after entering a surname, the program stops immediately. From my understanding, Console.Read() should return an int value of the first character of the string I enter (ASCII code?).

Why does the program terminate right after Console.Read()? Shouldn't Console.ReadLine() ensure the program stays open?

What I have tried:

if i use string r = Console.ReadLine();
then it works well.

推荐答案

您的程序不会保持打开状态，因为最后一个Console.ReadLine（）接受您在Console.Read（）指令上按下的[Enter]。



您可能想要使用ReadKey（）而不是Read（）来实现所需的功能。

Your program don't stay open because the last Console.ReadLine() takes the [Enter] you pressed on Console.Read() instruction.

You might want to use ReadKey() instead of Read() to achieve the desired functionality.

Console.Write("Enter your name: ");
string s = Console.ReadLine();
Console.WriteLine("Your name: " + s);
Console.Write("Enter your surname: ");
string r = Console.ReadKey(false).KeyChar.ToString();
Console.WriteLine();
Console.WriteLine("Your surname: " + r);
Console.WriteLine("Press any key to continue...");

Console.ReadKey(true);

祝你好运！

Best regards!

Console.Read （）接受输入流中的值，直到按Enter键。每次后续调用 Console.Read（）都会从该输入中读取单个字符。 Console.ReadLine（）从输入流中检索整行。你看到出了什么问题吗？



如果你输入XYZ并在按下Enter键> Console.Read（）你有YZ< enter>在 r 设置为X的输入流中。然后 Console.ReadLine（）选择剩余的YZ< enter> ;并且程序终止。这个怪癖是MSDN建议不要使用 Console.Read（）赞成 Console.ReadLine（）和 Console.ReadKey（）代替。



使用以下代码可以很容易地证明这一点：

Console.Read() accepts values into the input stream until Enter is pressed. Each subsequent call to Console.Read() reads a single character from that input. Console.ReadLine() retrieves a full line from the input stream. Do you see what's going wrong?

If you type in "XYZ" and press Enter at Console.Read() you have "YZ<enter>" in the input stream with r set to X. Then Console.ReadLine() picks up the remaining "YZ<enter>" and the program terminates. This quirk is why MSDN recommends not to use Console.Read() favoring Console.ReadLine() and Console.ReadKey() instead.

This is easily demonstrated with the following code:

int r = Console.Read();
Console.WriteLine(Console.ReadLine());
Console.ReadKey();

输入XYZ然后回车将产生以下输出：

Typing "XYZ" then Enter will yield the following output:

XYZ
YZ

这篇关于控制台在console.read（）之后终止，即使最后使用console.readline（）也是如此的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！