如何从方法返回bool值-Java 学习之路

我有一个循环，循环直到bool done = true;在方法TestMoves（）中，根据用户输入，该方法将bool作为true或false返回 . 但是，我不知道如何在Start（）方法中将此值“发送”回while循环以停止循环 . 这是我的代码：

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

namespace ConsoleApplication1
{
    class Program
    {


        public static void Main(string[] args)
        {
            Start("r");
        }

        public static string Start(string move)
        {

            Console.Write("Welcome to the Shotgun App\nEnter s for single player and m for multiplayer: ");
            string gameType = Console.ReadLine();

            if (gameType == "s")
            {

                Console.Write("Single Player Controls:\n r = reload\n s = shield\n f = fire\n ***you start with ammo\n Ready to play?");
                Console.ReadLine();

                int ammo = 1;

                bool done = false;
                while (!done)
                {
                    Console.Write("\nEnter your move: ");
                    move = Console.ReadLine();


                    switch (move)
                    {
                        case "r":
                            Console.Write("\nYou have reloaded, press enter for Genius\n");

                            ammo++;
                            Console.Write("Your ammo is " + ammo);

                            Console.ReadLine();

                            string geniusMove = "";
                            Genius(geniusMove, move, done);
                            Console.ReadLine();




                            break;
                        case "s":
                            Console.Write("\nYou have shielded, press enter for Genius\n");

                            Console.Write("Your ammo is " + ammo);

                            Console.ReadLine();

                            geniusMove = "";
                            Genius(geniusMove, move, done);
                            Console.ReadLine();




                            break;
                        case "f":
                            if (ammo != 0)
                            {
                                Console.Write("\nYou have fired, press enter for Genius\n");

                                ammo--;
                                Console.Write("Your ammo is " + ammo);

                                Console.ReadLine();

                                geniusMove = "";
                                Genius(geniusMove, move, done);
                                Console.ReadLine();
                            }
                            else
                            {
                                Console.Write("You don't have enough ammo, try again");
                                done = false;
                            }
                            break;
                        default:
                            Console.Write("\nInvalid move, try again\n");
                            done = false;
                            break;
                    }


                }
                return move;
            }
            else
            {
                return move;
            }
        }

        static string Genius(string geniusMove, string move, bool done)
        {
            int geniusAmmo = 1;

            geniusMove = "r";
            if (geniusMove == "f")
            {

                geniusAmmo--;
                Console.Write("Genius had decided to fire.\nGenius ammo is " + geniusAmmo + "\n");
            }
            else if (geniusMove == "r")
            {

                geniusAmmo++;
                Console.Write("Genius had decided to reload.\nGenius ammo is " + geniusAmmo + "\n");
            }
            else if (geniusMove == "s")
            {
                Console.Write("Genius had decided to shield.\nGenius ammo is " + geniusAmmo + "\n");
            }
            TestMoves(move, geniusMove, done);
            return geniusMove;
        }


        static bool TestMoves(string move, string geniusMove, bool done)
        {

            if (move == "s" && geniusMove == "f")
            {
                Console.Write("No one has died yet");
                done = false;
                return done;
            }
            else if (move == "f" && geniusMove == "f")
            {
                Console.Write("You both died!  Good game!");
                done = true;
                return done;
            }
            else if (move != "s" && geniusMove == "f")
            {
                Console.Write("You died!  Good game!");
                done = true;
                return done;
            }
            else if (move == "f" && geniusMove == "s")
            {
                Console.Write("No one has died yet");
                done = false;
                return done;
            }
            else if (move == "f" && geniusMove != "s")
            {
                Console.Write("Genius died!  Good game!");
                done = true;
                return done;
            }
            else if (move != "f" && geniusMove != "f")
            {
                Console.Write("No one has died yet");
                done = false;
                return done;
            }
            else
            {
                return done;
            }

        }
    }
}

4 回答

是否有理由需要从 Genius 内部而不是从循环中调用 TestMoves ？在我看来，您的代码可以像这样重写：

//Every instance of:

string geniusMove = "";
Genius(geniusMove, move, done);
Console.ReadLine();

//seems like it could be rewritten as:

string geniusMove = "";
Genius(geniusMove, move, done);
done = TestMoves(geniusMove, move, done);
Console.ReadLine();
//and then you can remove the call to TestMoves from Genius

所有代码的整体流程对我来说有点混乱 . 每个函数都返回一个值，但似乎没有对返回值执行任何操作 . 我有一种感觉，通过一些重构，你可以使这段代码更短更合理 .

在看了一下你的代码后，看起来你可以在循环的最后放置对TestMoves的调用：

default:
                        Console.Write("\nInvalid move, try again\n");
                        done = false;
                        break;
                }

                //add it here:
                done = TestMoves(geniusMove, move, done);

            }
            return move;

回复于 2024-04-18T20:50:17+08:00

您可以通过ref传递值：

static string Genius(string geniusMove, string move, ref bool done) ...

并从 TestMoves 返回：

static bool TestMoves(string move, string geniusMove) ...

打电话给它：

Genius(geniusMove, move, ref done);

回复于 2024-04-18T20:50:17+08:00

0

您可以在 done 参数上使用ref或out关键字

回复于 2024-04-18T20:50:17+08:00
0

由于 bool 是值类型，而不是引用类型，因此您无法像这样通过bool . 使用 out 关键字明确指定要将其作为引用传递：

http://msdn.microsoft.com/en-us/library/ee332485.aspx

回复于 2024-04-18T20:50:17+08:00

如何从方法返回bool值

4 回答

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