Java對如何安排“ if”語句感到困惑

Question

int i = 1;
int answer;
int d;
int e;
boolean alive = true;

System.out.println("\n");

System.out.println(enemies[i].getName() + " has appeared!");

System.out.print("\n");

while (alive == true) {

    System.out.println("Hitpoints[HP]: " + enemies[i].getHP());
    System.out.println("Attack[ATK]  : " + enemies[i].getATK());
    System.out.println("Mana[MANA]   : " + enemies[i].getMANA());

    System.out.println("\n");

    System.out.println("[1 - Attack]");
    System.out.println("[2 - Flee]");

    answer = In.getInt();

    System.out.println("\n");

    if (answer == 1) {

        if (user.getP_HP() > 0) {
            d = enemies[i].getHP() - user.getP_ATK();
            enemies[i].setHP(d);

            System.out.println(user.getP_Name() + " strikes the " + enemies[i].getName() + " for " + user.getP_ATK() + " damage.");
            System.out.println(enemies[i].getName() + " has " + enemies[i].getHP() + " HP remaining.");
            System.out.println("\n");
        } else if (user.getP_HP() <= 0) {
            System.out.println(user.getP_Name() + " has been slain by the " + enemies[i].getName() + "!");
            alive = false;
        }

        if (enemies[i].getHP() > 0) {
            e = user.getP_HP() - enemies[i].getATK();
            user.setP_HP(e);

            System.out.println("The " + enemies[i].getName() + " attacked you for " + enemies[i].getATK() + " damage.");
            System.out.println(user.getP_Name() + " has " + user.getP_HP() + " HP remaining.");
            System.out.println("\n");
        } else if (enemies[1].getHP() <= 0) {
            System.out.println(user.getP_Name() + " has slain the " + enemies[i].getName() + "!");
            alive = false;
        }

    } else if (answer == 2) {
        System.out.println("You try to run, but fall into a pit of spikes and die!");
        alive = false;
    }
}

您好，我現在有大約2個小時無法解決此問題。 我想做的是讓敵人在其HP達到0或更低時立即死亡，並且對於玩家來說也是如此。

這只有玩家先殺死妖精，而不是相反。

每當敵人首先殺死玩家時，它不會輸出您已經被殺死的信息。 相反，它使您可以選擇是否要再次進攻或逃跑。 選擇攻擊選項后，它僅表明您已被殺死。 但是，這還不是全部，在程序停止之前，妖精再次攻擊了您。

如果敵人先殺了你，這是示例輸出：

stackoverflow strikes the Goblin for 1 damage.
Goblin has 12 HP remaining.


The Goblin attacked you for 3 damage.
stackoverflow has 1 HP remaining.


Hitpoints[HP]: 12
Attack[ATK]  : 3
Mana[MANA]   : 1


[1 - Attack]
[2 - Flee]
1


stackoverflow strikes the Goblin for 1 damage.
Goblin has 11 HP remaining.


The Goblin attacked you for 3 damage.
stackoverflow has -2 HP remaining.


Hitpoints[HP]: 11
Attack[ATK]  : 3
Mana[MANA]   : 1


[1 - Attack]
[2 - Flee]
1


stackoverflow has been slain by the Goblin!
The Goblin attacked you for 3 damage.
stackoverflow has -5 HP remaining.

Answer 1

您實際上想按以下順序進行操作（假設您攻擊了）：

1. 詢問玩家他們想進攻還是逃跑
2. 你攻擊
3. 看看你是否殺死了怪物； 如果是這樣，游戲就結束了
4. 怪物襲擊
5. 看看怪物是否殺死了你； 如果是這樣，游戲就結束了
6. 重復直到出現＃3或＃5

您反轉＃3和＃5。

另外，以下行：

else if (enemies[1].getHP() <= 0)

我以為是錯字。 我認為你實際上是想做

else if (enemies[i].getHP() <= 0)

Answer 2

嘗試這個：

int i = 1;
int answer;
int d;
int e;
boolean alive = true;

System.out.println("\n");

System.out.println(enemies[i].getName() + " has appeared!");

System.out.print("\n");

while (alive == true) {

    System.out.println("Hitpoints[HP]: " + enemies[i].getHP());
    System.out.println("Attack[ATK]  : " + enemies[i].getATK());
    System.out.println("Mana[MANA]   : " + enemies[i].getMANA());

    System.out.println("\n");
    if (user.getP_HP() > 0) {
        System.out.println("[1 - Attack]");
        System.out.println("[2 - Flee]");

        answer = In.getInt();

        System.out.println("\n");
    } else if (user.getP_HP() <= 0) {
            System.out.println(user.getP_Name() + " has been slain by the " + enemies[i].getName() + "!");
            alive = false;
            answer = 0; //so it won't execute the rest of the code
            }

    if (answer == 1) {

        d = enemies[i].getHP() - user.getP_ATK();
        enemies[i].setHP(d);

        System.out.println(user.getP_Name() + " strikes the " + enemies[i].getName() + " for " + user.getP_ATK() + " damage.");
        System.out.println(enemies[i].getName() + " has " + enemies[i].getHP() + " HP remaining.");
        System.out.println("\n");

        if (enemies[i].getHP() > 0) {
            e = user.getP_HP() - enemies[i].getATK();
            user.setP_HP(e);

            System.out.println("The " + enemies[i].getName() + " attacked you for " + enemies[i].getATK() + " damage.");
            System.out.println(user.getP_Name() + " has " + user.getP_HP() + " HP remaining.");
            System.out.println("\n");
        } else if (enemies[1].getHP() <= 0) {
            System.out.println(user.getP_Name() + " has slain the " + enemies[i].getName() + "!");
            alive = false;
        }

    } else if (answer == 2) {
        System.out.println("You try to run, but fall into a pit of spikes and die!");
        alive = false;
    }
}

您需要在輸入之前檢查自己是否還活着。 可能不是最好的解決方案，但這是一個快速的解決方案，我希望它能為您指明正確的方向

Answer 3

好像不使用else if ，而不是else if ，而是這樣的：

// Process both attacks first.
if (user.getP_HP() > 0) {
    d = enemies[i].getHP() - user.getP_ATK();
    enemies[i].setHP(d);

    // ...
}
if (enemies[i].getHP() > 0) {
    e = user.getP_HP() - enemies[i].getATK();
    user.setP_HP(e);

    // ...
}
// Then resolve the deaths immediately after.
if (user.getP_HP() <= 0) {
    // ...
    alive = false;
}
if (enemies[1].getHP() <= 0) {
    // ...
    alive = false;
}