Question

我试图在回答问题后使用户输入“ 1”继续，并使用代码中的上一个循环显示下一个问题。我该怎么办？

string a = "x²";

var rand = new Random();
int num1 = 0;
int num2 = 0;
int b = rand.Next(-100, 100);
int c = rand.Next(-100, 100);

while (!((num1 + num2 == b) && (num1 * num2 == c)))
{
    b = rand.Next(-50, 50);
    c = rand.Next(-50, 50);
    num1 = rand.Next(-50, 50);
    num2 = rand.Next(-50, 50);
}

Console.WriteLine("{0} {1} {2}", a, b, c);
int x = int.Parse(Console.ReadLine());
int y = int.Parse(Console.ReadLine());
if ((x + y == b) && (x * y == c))
{
    Console.WriteLine("Correct!");
    Console.WriteLine("Continue? 1 for yes 0 for no");
    int next = int.Parse(Console.ReadLine());
    if ((next == 1) || (next == 0))
    {
        if (next == 1)
        {
            //display another trinomial question
        }
        else
        {
           //close application
        }
    }
    else
    {
         Console.WriteLine("You must input either a 1 or a 0");
    }
}
else
{
    Console.WriteLine("Wrong. Try Again");
    x = int.Parse(Console.ReadLine());
    y = int.Parse(Console.ReadLine());
}

我刚刚开始学习c＃，但我不知道如何执行这些功能，我试图在网上查找它，但找不到任何解决方案。谢谢你然后欢迎所有答案

Answer 1

首先我无法理解该程序的逻辑，但是我认为这就是您想要的。

我做什么：
我分开了继续检查。我创建了一个do {} while (condition)循环（您可以了解更多here），在这里我使用从Continue()方法返回的值。如果用户用true响应，则此方法返回1；如果响应是false，则返回0。当该值为true时，循环运行。在该循环中，在另一个用于测试用户答案的循环之后，它将显示问题。如果用户的答案不正确，那么它将再次询问，直到用户以正确的答案做出响应。之后它将要求继续。

namespace SO_Test
{
    class Program
    {
        const string a = "x²";

        static void Main(string[] args)
        {
            do
            {
                //Ask question
                var rand = new Random();
                int num1 = 0;
                int num2 = 0;
                int b = rand.Next(-100, 100);
                int c = rand.Next(-100, 100);

                while (!((num1 + num2 == b) && (num1 * num2 == c)))
                {
                    b = rand.Next(-50, 50);
                    c = rand.Next(-50, 50);
                    num1 = rand.Next(-50, 50);
                    num2 = rand.Next(-50, 50);
                }

                Console.WriteLine("{0} {1} {2}", a, b, c);
                //Test answer
                int x;
                int y;
                do
                {
                    x = int.Parse(Console.ReadLine());
                    y = int.Parse(Console.ReadLine());
                    if (!((x + y == b) && (x * y == c)))
                        Console.WriteLine("Wrong. Try Again");
                }
                while (!((x + y == b) && (x * y == c))) ;
            }
            while (Continue()) ; //Ask the user to continue

            Console.WriteLine("Press any key to exit");
            Console.Read(); //Prevent auto closing
        }

        private static bool Continue()
        {
            int next; //Declare variable
            Console.WriteLine("Correct!");
            Console.WriteLine("Continue? 1 for yes 0 for no");
            while (!new[] { 1, 0 }.Contains(next = int.Parse(Console.ReadLine())))
            {
                Console.WriteLine("You must input either a 1 or a 0");  //Print this line until the user input is 1 or 0
            }

            if (next == 1)
                return true; //Continue? Yes!
            else
                return false; //Continue? No.
        }
    }
}

Answer 2

因此，函数/方法是一段代码，通常执行一个小的但可重复的任务。它可以根据您指定的参数获取参数和/或返回某些值。函数始终以相同的方式声明；

[accessibility] [return type]   [name] ([parameters])    ie:
public/private  void/int/string  doSomething(int x, int y){ 
//Do the logic 
return somethingThatsOfYourReturnType
}

在您的情况下，您需要多个返回值。执行此操作的方法之一是使用关键字out。

public void createQuestion(out int x, out int y);

out关键字表示该函数将设置x和y的值，从而使您可以返回多个值。

通过一些重组，您可能会得到以下内容：

using System;

public class Program
{
    public static void Main()
    {
        int x = 0;
        int y = 0;
        while (true)
        {
            //Call create question function
            createQuestion(out x, out y); //out means that the function will set these numbers
            bool answeredCorrectly = false;
            while (!answeredCorrectly) // ! means not
            {
                Console.WriteLine("Printing Question {0} {1}", x, y);
                var inputX = Console.ReadLine();
                var inputY = Console.ReadLine();
                if (x.ToString() == inputX && y.ToString() == inputY)
                {
                    answeredCorrectly = true;
                }
                else
                {
                    Console.WriteLine("Try Again");
                }
            }

            Console.WriteLine("Correct!");
            Console.WriteLine("Continue? 1 for yes 0 for no");
            int next = int.Parse(Console.ReadLine());
            while (next != 1 && next != 0)
            {
                Console.WriteLine("Sorry must be 1 or 0");
                next = int.Parse(Console.ReadLine());
            }

            if (next == 1)
            {
                continue;
            }
            else if (next == 0)
            {
                return;
            }
        }
    }

    //definition of create question function
    public static void createQuestion(out int x, out int y)
    {
        //Do the math magic     
        x = 1;
        y = 2;
    }
}

Answer 3

我认为这是解决您问题的最简单方法：

static void Quiz(int b, int c)
        {
            int x = int.Parse(Console.ReadLine());
            int y = int.Parse(Console.ReadLine());
            if ((x + y == b) && (x * y == c))
            {
                Console.WriteLine("Correct!");
                Console.WriteLine("Continue? 1 for yes 0 for no");
                int next = int.Parse(Console.ReadLine());
                if ((next == 1) || (next == 0))
                {
                    if (next == 1)
                    {
                        Console.WriteLine("tutaj powt");
                    }
                    else
                    {
                        return;
                    }
                }
                else
                {
                    Console.WriteLine("You must input either a 1 or a 0");
                }
            }
            else
            {
                Console.WriteLine("Wrong. Try Again");
                x = int.Parse(Console.ReadLine());
                y = int.Parse(Console.ReadLine());
            }
        }

        static void Main(string[] args)
        {
            string a = "x²";

            var rand = new Random();
            int num1 = 0;
            int num2 = 0;
            int b = rand.Next(-100, 100);
            int c = rand.Next(-100, 100);

            while (!((num1 + num2 == b) && (num1 * num2 == c)))
            {
                b = rand.Next(-50, 50);
                c = rand.Next(-50, 50);
                num1 = rand.Next(-50, 50);
                num2 = rand.Next(-50, 50);
            }

            Console.WriteLine("{0} {1} {2}", a, b, c);

            Quiz(b, c);
        }

以后如何在代码中重新运行上一个循环？

3 个答案: