這是我的代碼，這個程序是一個簡單的猜數(shù)游戲，其中計算機在 1 和 x 之間選擇一個隨機數(shù)（在程序中設置），用戶將使用計算機的反饋來猜測數(shù)字，說明每個猜測是否正確高于或低于秘密數(shù)字。代碼由4個方法組成，一個main方法，在顯示播放指令后聲明了幾個變量。然后設置一個 while 循環(huán)來開始一個新游戲。在 while 循環(huán)中的 3 行中，調(diào)用了一個方法來開始玩新游戲，同時傳遞掃描儀/控制臺和一個稱為 guesses 的整數(shù)（每次調(diào)用此方法時都設置為 0）。這個整數(shù)，猜測，每次用戶進行猜測時都會增加一，應該在游戲方法結束時返回，但我似乎無法弄清楚為什么它沒有被返回。它需要返回，以便可以將其傳遞給 results 方法來計算如果用戶決定不再玩游戲將顯示的統(tǒng)計信息。任何幫助，將不勝感激...import java.util.*;public class Guess { public static void main(String[] Args) { Scanner console = new Scanner(System.in); Introduction(); //required int games = 0; int newGame = 1; int guesses = 0; int maxguesses = 0; int totalguesses = 0; while (newGame == 1) { String userNewGame = ""; games = games + 1; Game(guesses,console); //required if (guesses > maxguesses) { guesses = maxguesses; } totalguesses = totalguesses + guesses; System.out.print("Do you want to play again? "); userNewGame = console.next(); System.out.println(); char first = userNewGame.charAt(0); if ( first == 'Y' || first == 'y') { newGame = 1; } else if ( first == 'N' || first == 'n') { newGame = 0; } } Results(games,totalguesses,maxguesses); //required }
2 回答
當年話下
TA貢獻1890條經(jīng)驗 獲得超9個贊
這里發(fā)生了一些事情，而且所有這些都建立在彼此的基礎上。
您沒有捕獲從Game.
您對變量做了一些非常奇怪的事情，這降低了可讀性。
Scanner當您循環(huán)執(zhí)行此程序時，您將遇到問題。
讓我們從唾手可得的果實開始。 Game返回一個int，但它沒有被分配到任何地方。理想情況下，它應該分配給 的值guesses。
guesses = Game(guesses,console); //required
...除了在以下情況下傳入并沒有真正意義guesses：
我們正在main 中重新分配它（別擔心，該Game方法無論如何都會有自己的猜測副本，因為 Java 是按值傳遞的）
無論如何，您明確地將其分配給 0Game
因此，您希望將其作為方法的參數(shù)刪除。
guesses = Game(console);
在 中Game，您可以定義自己的guesses變量。
public static int Game(Scanner console) {
Random rand = new Random();
int range = 100; //Change this value to set the range the computer will require to guess ie. 100 is 1 to 100 inclusive, 5 is 1 to 5 inclusive, etc.
int number = rand.nextInt(range) + 1;
int guesses = 0;
int guess = -1;
System.out.println("I'm thinking of a number...");
while (guess != number) {
System.out.print("Your guess? ");
guess = console.nextInt();
guesses = guesses + 1;
if (guess < number) {
System.out.println("higher");
}
if (guess > number) {
System.out.println("lower");
}
if (guess == number) {
System.out.println("You got it right in " + guesses + " guesses");
System.out.println();
}
}
return guesses;
}
我能看到的最后一個明顯問題是您正在使用的問題next()，但您并沒有完全清除Scanner.
userNewGame = console.next();
// and inside of Game()
guess = console.nextInt();
這是一個令人驚訝的常見Scanner問題，而且很容易解決。
userNewGame = console.next();
console.nextLine();
// and inside of Game()
guess = console.nextInt();
console.nextLine();
或者，您可以使用nextLine而不是處理，next()因為它們都返回String. 不同之處在于next()不消耗通過返回所產(chǎn)生的換行字符/確認，并且nextLine() 確實。
海綿寶寶撒
TA貢獻1809條經(jīng)驗 獲得超8個贊
您應該使用返回值來更新變量，而不是僅僅調(diào)用 Guesses 方法，如下所示：
guesses = Game(guesses,console); //required
如果您希望 maxguesses 保持最大數(shù)量的猜測（在所有游戲中），那么您應該在調(diào)用 Game 方法之后更新您的邏輯，如下所示，
if (guesses > maxguesses) {
maxguesses = guesses; // not guesses = maxguesses
}
這是我發(fā)布的整個代碼，我認為它運行良好?？纯催@個：
import java.util.*;
public class Guess {
public static void main(String[] Args) {
Scanner console = new Scanner(System.in);
Introduction(); //required
int games = 0;
int newGame = 1;
int guesses = 0;
int maxguesses = 0;
int totalguesses = 0;
while (newGame == 1) {
String userNewGame = "";
games = games + 1;
guesses = Game(guesses,console); //required
if (guesses > maxguesses) {
maxguesses = guesses;
}
totalguesses = totalguesses + guesses;
System.out.print("Do you want to play again? ");
userNewGame = console.next();
System.out.println();
char first = userNewGame.charAt(0);
if ( first == 'Y' || first == 'y') {
newGame = 1;
}
else if ( first == 'N' || first == 'n') {
newGame = 0;
}
}
Results(games,totalguesses,maxguesses); //required
}
public static void Introduction() {
System.out.println("This program allows you to play a guessing game.");
System.out.println("I will think of a number between 1 and 100");
System.out.println("and will allow you to guess until you get it.");
System.out.println("For each guess, I will tell you whether the");
System.out.println("right answer is higher or lower than your guess.");
System.out.println();
}
public static int Game(int guesses, Scanner console) {
Random rand = new Random();
int range = 100; //Change this value to set the range the computer will require to guess ie. 100 is 1 to 100 inclusive, 5 is 1 to 5 inclusive, etc.
int number = rand.nextInt(range) + 1;
guesses = 0;
int guess = -1;
System.out.println("I'm thinking of a number...");
while (guess != number) {
System.out.print("Your guess? ");
guess = console.nextInt();
guesses = guesses + 1;
if (guess < number) {
System.out.println("higher");
}
if (guess > number) {
System.out.println("lower");
}
if (guess == number) {
System.out.println("You got it right in " + guesses + " guesses");
System.out.println();
}
}
return guesses;
}
public static void Results(int games,int totalguesses,int maxguesses) {
System.out.println("Overall results:");
System.out.println(" total games = " + games);
System.out.println(" total guesses = " + totalguesses);
System.out.println(" guesses/game = " + totalguesses / games);
System.out.println(" max guesses = " + maxguesses);
}
}
示例輸出：
This program allows you to play a guessing game.
I will think of a number between 1 and 100
and will allow you to guess until you get it.
For each guess, I will tell you whether the
right answer is higher or lower than your guess.
I'm thinking of a number...
Your guess? 10
higher
Your guess? 50
lower
Your guess? 40
lower
Your guess? 30
lower
Your guess? 20
lower
Your guess? 15
You got it right in 6 guesses
Do you want to play again? y
I'm thinking of a number...
Your guess? 50
higher
Your guess? 80
higher
Your guess? 90
lower
Your guess? 85
You got it right in 4 guesses
Do you want to play again? n
Overall results:
total games = 2
total guesses = 10
guesses/game = 5
max guesses = 6
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