Question

在这里完成初学者......

通过一个无意识概率游戏的在线示例来解决问题。用户杀死龙或被吃掉的地方。我知道游戏使用while循环，所以我尝试使用for循环复制它但失败了。我很好奇为什么for循环不起作用，如果有一些明显的原因需要使用while循环来完成。

下面是工作示例，带有一个while循环来提供上下文。

var slaying = true;
var youHit = Math.floor(Math.random() * 2);
var damageThisRound = Math.floor(Math.random() * 5 + 1);
var totalDamage = 0;

while (slaying) {
  if (youHit) {
    console.log("You hit the dragon and did " + damageThisRound + " damage!");
    totalDamage += damageThisRound;

    if (totalDamage >= 4) {
      console.log("You did it! You slew the dragon!");
      slaying = false;
    } else {
      youHit = Math.floor(Math.random() * 2);
    }
  } else {
    console.log("The dragon burninates you! You're toast.");
    slaying = false;
  }
}

这是无法正常工作 for循环。

var youHit = Math.floor(Math.random() * 2);
var damageThisRound = Math.floor(Math.random() * 5 + 1);

for(totalDamage=0;totalDamage>3;totalDamage+=damageThisRound){
    if(youHit){
        console.log("You hit and did "+damageThisRound);
        totalDamage += damageThisRound;

        if(totalDamage>3){
            console.log("You did it! You slew the dragon!");
        } else {
            youHit = Math.floor(Math.random() * 2);
        }
    } else {
        console.log("The dragon kills you");
    }
}

由于

Answer 1

在public class test extends Activity { private TextView textView; private int i = 0; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.test); textView = (TextView)findViewById(R.id.text); set(); } private void set(){ final String text ="A n d r o i d P r o g r a m m i n g"; final String[] words = text.toString().split(" "); final Handler handler = new Handler(); handler.post(new Runnable(){ @Override public void run() { textView.setText(""+words[i]); i++; if(i < words.length) { handler.postDelayed(this, 1000); } } }); }}循环中，您将for设置为totalDamage，然后拨打0。而是将totalDamage > 3循环更改为

for

换句话说，您切换了一个符号，因为您将变量设置为for(totalDamage=0;totalDamage<3;totalDamage+=damageThisRound){，然后仅在变量大于而不是0时继续。

Answer 2

您的循环条件是问题

＆＃13;

<xsl:variable name="temp" select="//MappingStatusHistory[Status='A']"/>
<xsl:value-of select="$temp[last()]/Status"/>
<xsl:value-of select="$temp[last()]/Date"/>

＆＃13;

var youHit, damageThisRound;
for (var totalDamage = 0; totalDamage < 4; totalDamage += damageThisRound) {
  youHit = Math.floor(Math.random() * 2);
  if (youHit) {
    //need to calculare the damage in each loop
    damageThisRound = Math.floor(Math.random() * 5 + 1);
    snippet.log("You hit and did " + damageThisRound);

  } else {
    snippet.log("The dragon kills you");
    //you need to stop the loop here
    break;
  }
}
//need this outside of the loop since the increment is in the for loop block
if (youHit) {
  snippet.log("You did it! You slew the dragon!");
}

＆＃13;

对于Javascript中的循环与while循环

2 个答案: