如何让我的代码有条件地循环回到它的开头？

Question

我是 Java 的初学者。我在大学第一门课程的第二周，已经喜欢编程了。我一直在尝试使用我在讲座和实验室中学到的一些东西来创建一个小游戏，但我遇到了一些问题。

代码如下：

public class MathGame {
public static void main(String args[]){

    System.out.println("~~~~Welcome to ____!~~~~~");
    System.out.println("Press 'S' to continue");

    char startGame;
    char correctStart = 'S';
    startGame = TextIO.getChar();
    if (startGame == correctStart){

        System.out.println("Both you and the computer will start with 20 lives");   //Game explanation
        System.out.println("Use different move options to reduce your opponents life");
        System.out.println("First one down to zero loses!");
        System.out.println("OK here we go:");


        int lifeTotal1 = 10;
        int lifeTotal2 = 10;
        int turnNum = 0;
        turnNum ++;

        System.out.println("Start of turn: " + turnNum);
        System.out.println("Your life total is " + lifeTotal1 + " your opponents life total is " + lifeTotal2);     //Starts turn
        System.out.println("Select a move:");
        System.out.println("Press 1 to do 3 damage");
        System.out.println("Press 2 to do a random amount of damage");
        System.out.println("Press 3 to heal 2 damage");

        int userAttack1;
        userAttack1 = TextIO.getInt();

        if(userAttack1 == 1){           //User attack #1 selected
            lifeTotal2 -=3; 
        }
        if(userAttack1 == 2){           //User attack #2 selected
            double random1 = Math.random();
            if (random1 > 0 && random1 <= .2){
                lifeTotal2 -= 1;
            }
            if (random1 > .2 && random1 <= .4){
                lifeTotal2 -= 2;
            }
            if (random1 > .4 && random1 <= .6){
                    lifeTotal2 -= 3;
            }
            if (random1 > .6 && random1 <= .8){
                    lifeTotal2 -= 4;
            }
            if (random1 > .8 && random1 <= 1){
                        lifeTotal2 -=5;
            }
        }

        if (userAttack1 == 3){
            lifeTotal1 += 2;
        }

    System.out.println("End of turn");
    System.out.println("Your current health is " + lifeTotal1);
    System.out.println("Your opponents current health is " + lifeTotal2);

    if (lifeTotal1 <= 0){
        System.out.println("Game over, you lose");
    if (lifeTotal2 <= 0){
        System.out.println("Game over, you win");
    }
        }else{

在 else 语句之后，我实际上只是复制并粘贴了代码以开始新的回合，直到其中一个生命总数降至 0。这是一个问题，因为它创建了有限数量的回合。如何让我的代码继续循环，直到生命总数达到零？

我知道游戏还远未完成。我将不胜感激任何帮助！ 非常感谢

Answer 1

假设你从 1 迭代到 10 并且在某个迭代中你需要重新开始循环，那么你可以做这样的事情

for(int i=1 ;i<=10; i++){
   if(condition) {
      // This will make sure that the loop starts from the beginning.
      i=0;
   }
}

Answer 2

while 循环可用于迭代直到满足条件。这将循环直到生命总数达到 0。

//Game set up code before your loop

while (lifeTotal1 > 0 && lifeTotal2 > 0) {

    // Any code in here will repeat until one life total hits 0

}

//Code here to handle the game being over