Question

我只是一个初学者来到android＆amp; java的。我试图建立一个应用程序，告诉你是否在赌博上赢得或失去了鞅。

我的理念是，您可以设定您的金钱，目标和最低赌注。

例如，如果我将当前的金额设置为1000，并且我的目标是获得1100，并且最小赌注是100，那么应用程序将自动运行该功能10次并计算赢率。

现在我被困了，关于如何让应用程序计算赢率，我尝试了下面的代码，但是它没有用。

public int winPercentage (){
  int numberWin = 0;
  for (int i = 0; i <= 10; i++) {
    boolean win = calRate(double currentMoney, double theTarget, double minBet);
    if (win) {
      numberWin = numberWin + 1;
    }
  }
  return numberWin;
}

我的完整Java代码

package com.example.android.gambling;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.Editable;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
  }

  public void seeRate(View view) {

    EditText cMoney = (EditText) findViewById(R.id.money);
    double currentMoney = Double.parseDouble(cMoney.getText().toString());

    EditText target = (EditText) findViewById(R.id.target);
    double theTarget = Double.parseDouble(target.getText().toString());

    EditText bet = (EditText) findViewById(R.id.bet);
    double minBet = Double.parseDouble(bet.getText().toString());

    TextView textview = (TextView)findViewById(R.id.textView);
    textview.setText("You " + winPercentage());
  }

  public boolean calRate(double currentMoney, double theTarget, double minBet) {
    while (currentMoney > minBet) {
      boolean win = winRate();
      if (win) {
        currentMoney += minBet;
        minBet = minBet;
      }
      else {
        currentMoney -= minBet;
        minBet *= 2;
      }
      if (currentMoney >= theTarget){
        return true;
      }

    }

    return false;
  }

  private boolean winRate() {
    double d = Math.random();
    if (d < 0.5)
      return true;
    else
      return false;
  }

  public int winPercentage (){
    int numberWin = 0;
    for (int i = 0; i <= 10; i++) {
      boolean win = calRate(double currentMoney, double theTarget, double minBet);
      if (win){
        numberWin = numberWin + 1;
      }
    }
    return numberWin;
  }
}

修改

现在我修改了下面的代码，android studio没有显示任何错误，但是当我尝试模拟它时，它无法打开，继续显示（不幸的是，应用已停止）

package com.example.android.gambling;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.Editable;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

    }

    EditText cMoney = (EditText) findViewById(R.id.money);
    double currentMoney = Double.parseDouble(cMoney.getText().toString());

    EditText target = (EditText) findViewById(R.id.target);
    double theTarget = Double.parseDouble(target.getText().toString());

    EditText bet = (EditText) findViewById(R.id.bet);
    double minBet = Double.parseDouble(bet.getText().toString());

    boolean findRate = calRate(currentMoney, theTarget, minBet);


    public void seeRate(View view) {


        TextView textview = (TextView)findViewById(R.id.textView);
        textview.setText("You " + winPercentage());



    }

    public boolean calRate(double currentMoney, double theTarget, double minBet) {

        while (currentMoney>minBet){
            boolean win = winRate();
            if (win){
                currentMoney += minBet;
                minBet = minBet;
            }
            else {
                currentMoney -= minBet;
                minBet *= 2;
            }
            if (currentMoney>=theTarget){
                return true;
            }

        }

        return false;
    }

    private boolean winRate() {
        double d = Math.random();
        if (d < 0.5)
        return true;
        else
            return false;

    }

    public int winPercentage (){
        int numberWin = 0;
        for (int i=0; i<=10; i++){
            boolean win = calRate(currentMoney, theTarget, minBet);
            if (win){
                numberWin = numberWin + 1;
            }

        }
        return numberWin/10*100;
    }
}

Answer 1

调用时必须将参数传递给方法'calRate()。无需指定参数的类型。将行更改为

boolean win = calRate(double currentMoney,double theTarget,double minBet);

到

boolean win = calRate(currentMoney, theTarget, minBet);

这样可行。

修改

您必须在方法中定义变量currentMoney，theTarget和minBet。为此，您有两种选择。

将它们设为全局：在seeRate()方法之外定义变量并使用它们。

将它们作为参数传递给winPercentage()方法。

按如下方式定义winPercentage()：

public int winPercentage (double currentMoney, double theTarget, double minBet) { int numberWin = 0; for (int i=0; i<=10; i++){ boolean win = calRate(currentMoney, theTarget, minBet); if (win){ numberWin = numberWin + 1; } } return numberWin; }

被困在循环上

1 个答案: