Question

我需要一点帮助，我的机器人猜测游戏应用程序的一些java编码。

目前，我的if else语句涵盖猜测是否太高，太低或正确。我想要它做的是告诉用户他们给出的答案是接近答案还是远离答案。比如说，在50％或50％以内。我可以做其他地方使用数字，但是当我试图找出如何根据程序生成的随机数计算出百分比时，我会感到难过。如果它是一个静态数字我会没事的但是我不能这样做。

非常感谢任何帮助。

package lab.mad.cct.c3375331task1;

import android.content.DialogInterface;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import java.util.Random;

public class Task1Activity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.task1_layout);

        final TextView textResponse = (TextView)           findViewById(R.id.txtResponse);
        final TextView guessText = (TextView) findViewById(R.id.txtAnswer);
        final EditText userGuess = (EditText) findViewById(R.id.etNumber);

        Button pressMe = (Button) findViewById(R.id.btnGuess);



    // When the button is clicked, it shows the text assigned to the txtResponse TextView box
        pressMe.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String randText = "";
                Random randGen = new Random();
                int ranNum = randGen.nextInt(5);
                int userNumber =   Integer.parseInt(userGuess.getText().toString());
                int attempts = 0;


                if (userNumber >19 ) {
                    guessText.setText("Please guess between 0 and 20");
                } else if (userNumber == ranNum) {
                    guessText.setText("You got it!");
                } else if (userNumber < ranNum) {
                    guessText.setText("Your answer is too low. Guess     again!");
                    guessText.setBackgroundColor(Color.RED);
                } else if (userNumber > ranNum) {
                    guessText.setText("Your answer is too high.  Guess again!");
                }

                randText = Integer.toString(ranNum);
                textResponse.setText("");

                userGuess.setText("");

            }
        });

    } 



}

Answer 1

您可以像这样计算两个数字（随机数和猜测数字）之间的百分比差异：

public static String flattenToAscii(String string) {
    char[] out = new char[string.length()];
    String normalized = Normalizer.normalize(string, Normalizer.Form.NFD);
    int j = 0;
    for (int i = 0, n = normalized.length(); i < n; ++i) {
        char c = normalized.charAt(i);
        if (c <= '\u007F') out[j++] = c;
    }
    return new String(out);
}

值public float percentDiff(int randomNumber, int guessedNumber) { int diff = Math.abs(randomNumber - guessedNumber); float diffPercentage = (float) diff / (float) randomNumber; System.out.println("" + diffPercentage); return diffPercentage; }将超过50％，反之亦然。

Answer 2

如果你想计算（在飞行中）用户提供的数字是随机生成的数字的百分比，那么你可以使用一个简单的公式，如：

int percentOf = ((userNumber * 100) / ranNum);

Android App如果有其他语句

2 个答案: