所以上周我必须通过Java创建一个Rock，Paper，Scissors游戏。我有几个问题可以在这里澄清一下。不幸的是，我还在另一个果酱。
所以，我试图添加一个功能，以便能够玩电脑而不仅仅是PvP。我创建了一个数组并指示程序随机选择这些选择。然后我使用 if 语句添加了赢/输背后的逻辑。
一切看起来干净而没有错误;直到我继续将我的void方法集成到我的main方法来运行程序。我收到一条错误说明
C:\Users\AVLG2\Documents\NetBeansProjects\R.P.S.game\src\RPSGame.java:104: error: '.class' expected
compRandom (char P1, char cmpChoice);
C:\Users\AVLG2\Documents\NetBeansProjects\R.P.S.game\src\RPSGame.java:104: error: ';' expected
compRandom (char P1, char cmpChoice);
C:\Users\AVLG2\Documents\NetBeansProjects\R.P.S.game\src\RPSGame.java:104: error: ';' expected
compRandom (char P1, char cmpChoice);
3 errors
我仔细检查以确保我拥有所有的＆＃34 ;;＆＃34;我回到了我的输赢逻辑，并将if (P1 == 'P' && cmpChoice == 'R')更改为&& cmpChoice == 1)和&& cmpChoice == [0])
我觉得我完全误解了这个错误。有什么建议？这是我的代码：
import java.util.Scanner;
public class RPSGame {
//game mode menu
public static void gameModeSelect (int modeSelect){
System.out.println("Welcome to Rock, Paper, Scissors 1.0 !\n\nPlease select your game mode:\n ");
System.out.println("1. Player vs. Computer\n2. Player vs. Player \n ");
}
//cvp random choice
public static void compRandom (char P1, char cmpChoice){
char[] cmp;
cmp = new char [3];
cmp[0] = 'R';
cmp[1] = 'P';
cmp[2] = 'S';
cmpChoice = (char) (Math.random()*3);
System.out.println(cmp[cmpChoice]);
//game logic CvP
if (P1 == 'P' && cmpChoice == 'R'){
System.out.println("Paper covers rock! Player one wins!");
} else if (P1 == 'R' && cmpChoice == 'P'){
System.out.println("Paper covers rock! Computer wins!");
}
if (P1 == 'R' && cmpChoice == 'S'){
System.out.println("Rock breaks scissors! Player one wins!");
} else if (P1 == 'S' && cmpChoice == 'R'){
System.out.println("Rock breaks scissors! Computer wins!");
}
if (P1 == 'S' && cmpChoice == 'P'){
System.out.println("Scissor cuts paper! Player one wins!");
} else if (P1 == 'P' && cmpChoice == 'S'){
System.out.println("Scissor cuts paper! Computer wins!");
} //game logic for same inputs CvP
if (P1 == 'P' && cmpChoice == 'P'){
System.out.println("Draw!");
} if (P1 == 'R' && cmpChoice == 'R'){
System.out.println("Draw!");
} if (P1 == 'S' && cmpChoice == 'S'){
System.out.println("Draw!");
}
}
//game logic PVP
public static void PvPwinLoss (char P1, char P2){
//game logic: paper covers rock, rock breaks paper, scissor cuts paper
if (P1 == 'P' && P2 == 'R'){
System.out.println("Paper covers rock! Player one wins!");
} else if (P1 == 'R' && P2 == 'P'){
System.out.println("Paper covers rock! Player two wins!");
}
if (P1 == 'R' && P2 == 'S'){
System.out.println("Rock breaks scissors! Player one wins!");
} else if (P1 == 'S' && P2 == 'R'){
System.out.println("Rock breaks scissors! Player two wins!");
}
if (P1 == 'S' && P2 == 'P'){
System.out.println("Scissor cuts paper! Player one wins!");
} else if (P1 == 'P' && P2 == 'S'){
System.out.println("Scissor cuts paper! Player two wins!");
} //game logic for same inputs PvP
if (P1 == 'P' && P2 == 'P'){
System.out.println("Draw!");
} if (P1 == 'R' && P2 == 'R'){
System.out.println("Draw!");
} if (P1 == 'S' && P2 == 'S'){
System.out.println("Draw!");
}
}
//game config
public static void main(String[] args) {
Scanner keyboard = new Scanner(System.in);
//player one and two char variables
char P1;
char P2;
//mode selection variable
int modeSelect = 0;
//game mode menu selection output
gameModeSelect (modeSelect);
modeSelect = keyboard.nextInt();
//error for invalid game mode input
while ((modeSelect >2) || (modeSelect <1)){
System.out.println("Error: Invalid game mode");
gameModeSelect (modeSelect);
modeSelect = keyboard.nextInt();
}
//if game mode input valid:
if (modeSelect == 1){// under construction
//game rules
System.out.println("Rules of the game: R = Rock, P = Paper, S = Scissors\nGood luck!\n ");
//request player input
System.out.println("Player one: Enter your move");
P1 = keyboard.next().charAt(0);
System.out.println("Computer has chosen a random move . . .");
compRandom (char P1, char cmpChoice);
} else if (modeSelect == 2){ // player vs. player break down
//game rules
System.out.println("Rules of the game: R = Rock, P = Paper, S = Scissors\nGood luck!\n ");
//request player input
System.out.println("Player one: Enter your move");
P1 = keyboard.next().charAt(0);
System.out.println("Player two: Enter your move");
P2 = keyboard.next().charAt(0);
PvPwinLoss(P1, P2);//game logic: output - win, lose, or draw
}
}
}
答案 0 :(得分：0)
注意：
首先仔细阅读错误消息。并修复你的语法错误 可以轻松理解：
;
在这里你错过了一个分号（C:\Users\AVLG2\Documents\NetBeansProjects\R.P.S.game\src\RPSGame.java:104: error: '.class' expected
compRandom (char P1, char cmpChoice);
）。首先尝试解决这些问题。
格式化整个代码行。使用适当的缩进，空行和命名约定。即使对我们来说，这些也会让您轻松浏览代码。
我认为您在此无法理解的错误是：
compRandom (char P1, char cmpChoice) if (modeSelect == 1){// under construction
//game rules
System.out.println("Rules of the game: R = Rock, P = Paper, S = Scissors\nGood luck!\n ");
//request player input
System.out.println("Player one: Enter your move");
P1 = keyboard.next().charAt(0);
System.out.println("Computer has chosen a random move . . .");
compRandom (char P1, char cmpChoice);
}
是您实施的方法，它有两个参数。调用方法时，必须给出两个参数来匹配这两个参数。
但你所做的是，当你调用方法而不是给出值（参数）时，你试图声明两个变量（在调用方法中）。 无法完成，编译器会感到困惑。
看最后一行：
compRandom (char P1, char cmpChoice);而不是这个compRandom (P1, 'c');
尝试传递两个值或初始化变量。
像：
'c'此import UIKit
enum TypeOfDay {
case weekday
case weekend
}
class TabBarViewController: UITabBarController {
var typeOfDay: TypeOfDay = .weekday
override func viewDidLoad() {
super.viewDidLoad()
// Initial order is: WeekendVC, WeekdayVC, OtherVC
if let currentViewControllers = self.viewControllers {
let weekendVC = currentViewControllers[0]
let weekdayVC = currentViewControllers[1]
let otherVC = currentViewControllers[2]
switch typeOfDay {
case .weekend:
self.viewControllers = [weekendVC, otherVC]
case .weekday:
self.viewControllers = [weekdayVC, otherVC]
}
}
}
}
向您展示。你可以放任何你想要的东西。
在我看来，你复制了这个方法而忘了改变它。