我正在创建一个骰子游戏，其中4个骰子通过数字0-6滚动。滚动之后，我想问用户是否要重新滚动其骰子的0、1或2。我在更新d1，d2，d3，d4变量（相应的骰子）时遇到问题，我不确定如何正确构造while循环来实现我的目标。我有尝试将其注释掉的代码，因为它无法正常工作。它会重新向用户询问，并且永远不会逃脱while循环。它还不会更新所选骰子的变量。
非常感谢您的帮助。
我已经尝试过if-else，while，do-while循环和语句。我认为我没有正确构造它们。
public class Program6b {
public static void main (String[]args)
{
Scanner stdIn = new Scanner(System.in);
// This next section is an introduction to what my program does. \\
System.out.println("Welcome to Coulter's Dice Game!");
System.out.println("---------------------------------------------");
System.out.println("Any Quad and you win! (106 wins)");
System.out.println("Any Triple and you win! (6 wins)");
System.out.println("Any Two-Pair is a win! (4 wins)");
System.out.println("Anything else and you lose. (1 loss)");
System.out.println("---------------------------------------------");
System.out.println();
System.out.println("Type anything to roll your first die.");
String dontMindMe = "";
dontMindMe = stdIn.next();
System.out.println();
System.out.println("---------------------------------------------");
System.out.println();
int d1, d2, d3, d4; // Int variables for 4 die.
int wins = 0, loses = 0; // Keeps track of wins and loses.
int rounds = 0; // Keeps track of rounds played.
String playAgain = ""; // String to store if the user would like to play again.
boolean win = false; // Boolean to determine if the player one.
String rerollOne, rerollTwo;
do
{
rounds = rounds + 1; // Adds 1 round every time the program is looped.
d1 = (int)(Math.random() * 6) + 1;
d2 = (int)(Math.random() * 6) + 1;
d3 = (int)(Math.random() * 6) + 1;
d4 = (int)(Math.random() * 6) + 1;
System.out.println(" Player ");
System.out.println("----------");
System.out.println(d1 + " " + d2 + " " + d3 + " " + d4); // Outputs the dice rolls.
System.out.println();
win = false; // Resets the win boolean to false.
// This next section asks the user if they would like to re-roll their dice
int choice;
/* System.out.println("How many dice would you like to reroll? (0,1,2): ");
choice = stdIn.nextInt();
while (choice != 0)
{
if (choice == 1)
{
System.out.println("What is the one die you would like to reroll? (d1, d2, d3, d4): ");
rerollOne = stdIn.next();
System.out.println();
if (rerollOne == "d1")
{
d1 = (int)(Math.random() * 6) + 1;
}
else if (rerollOne == "d2")
{
d2 = (int)(Math.random() * 6) + 1;
}
else if (rerollOne == "d3")
{
d3 = (int)(Math.random() * 6) + 1;
}
else if (rerollOne == "d4")
{
d4 = (int)(Math.random() * 6) + 1;
}
System.out.println(" Player ");
System.out.println("----------");
System.out.println(d1 + " " + d2 + " " + d3 + " " + d4); // Outputs the dice rolls.
System.out.println();
}
else if (choice == 2)
{
System.out.println("What is the first die you would like to reroll? (d1, d2, d3, d4): ");
rerollOne = stdIn.next();
System.out.println();
if (rerollOne == "d1")
{
d1 = (int)(Math.random() * 6) + 1;
}
else if (rerollOne == "d2")
{
d2 = (int)(Math.random() * 6) + 1;
}
else if (rerollOne == "d3")
{
d3 = (int)(Math.random() * 6) + 1;
}
else if (rerollOne == "d4")
{
d4 = (int)(Math.random() * 6) + 1;
}
System.out.println("What is the second die you would like to reroll? (d1, d2, d3, d4): ");
rerollTwo = stdIn.next();
System.out.println();
if (rerollTwo == "d1")
{
d1 = (int)(Math.random() * 6) + 1;
}
else if (rerollTwo == "d2")
{
d2 = (int)(Math.random() * 6) + 1;
}
else if (rerollTwo == "d3")
{
d3 = (int)(Math.random() * 6) + 1;
}
else if (rerollTwo == "d4")
{
d4 = (int)(Math.random() * 6) + 1;
}
System.out.println(" Player ");
System.out.println("----------");
System.out.println(d1 + " " + d2 + " " + d3 + " " + d4); // Outputs the dice rolls.
System.out.println();
}
else
{
System.out.println("How many dice would you like to reroll? (0,1,2): ");
choice = stdIn.nextInt();
}
} */
// This next if, else if, and else statement determines what the player wins. \\
if ( (d1 == d2) && (d2 == d3) && (d3 == d4) ) // Quad win (106 wins)
{
win = true;
wins = wins + 106;
System.out.println();
System.out.println("Quad win! (106 wins added)");
}
else if ( (d1 == d2) && (d2 == d3) ||
(d1 == d2) && (d2 == d4) ||
(d1 == d3) && (d3 == d4) ||
(d2 == d3) && (d3 == d4) ) // Triple win (6 wins)
{
win = true;
wins = wins + 6;
System.out.println();
System.out.println("Triple win! (6 wins added)");
}
else if (
(d1 == d2) && (d3 == d4) ||
(d1 == d3) && (d2 == d4) ||
(d1 == d4) && (d2 == d3) ) // Two pair win (4 wins)
{
win = true;
wins = wins + 4;
System.out.println();
System.out.println("Two-pair! (4 wins added)");
}
if ( win ) // If statement to print out if the user won.
{
System.out.println();
System.out.println("Yay! You won this dice round!");
System.out.println();
}
else
{
++loses; // Else statement to ass to the total loses and print out if the user lost.
System.out.println();
System.out.println("Bummer, that's a junker!");
System.out.println();
}
do // Do-while to make sure the user enters 'y' or 'n'.
{
System.out.println("Would you like to play again? (y/n): ");
playAgain = stdIn.next();
} while (!(playAgain.equalsIgnoreCase("y") || playAgain.equalsIgnoreCase("n")));
System.out.println(); // Creates an empty space to tidy the output up.
} while (playAgain.equalsIgnoreCase("y"));
// This next section displays the final total of wins and loses. \\
System.out.println("---------------------------------------------");
System.out.println();
System.out.println("Here are your results:");
System.out.println("Total Rounds: " + (rounds));
System.out.println("Total Rounds Lost: " + loses);
System.out.println("Total Wins: " + wins);
}
}
如果要重新滚动1个或2个骰子，我希望用户得到提示，并且该程序可以正常工作。我希望数字是与用户输入内容相对应的更新。完成之后，我希望向用户展示他们的胜利，并询问他们是否愿意再次玩。
答案 0 :(得分：0)
您没有在条件中正确比较字符串。由于您使用==运算符比较字符串，因此您的代码正在检查引用是否相等。在您的情况下，这将始终为false。
例如，更改此：
if (rerollOne == "d1")
对此：
if ("d1".equals(rerollOne))
equals方法将比较字符串的内容。
此外，由于您仅在else块中提示输入新的choice，所以您将永远无法重新滚动。我建议将针对新choice的提示移到else之外，以便您在循环的每次迭代中提示新的选择，并完全删除else。