Question

我的getMinValue()方法出现逻辑错误。 getMaxValue()方法有效，所以我不明白为什么最小方法不起作用。

import java.io.*;
import java.lang.*;
import java.util.*;

public class FILE {

public static void main(String[] main) throws IOException {
    int sum = 0;
    int counter = 0;
    int i = 0;
    int[] quizArray = new int[20];
    double average = 0.0;
    FileReader myReader = new FileReader(
            "C:\\Users\\Mike\\Desktop\\QuizScores.txt");
    BufferedReader intHunter = new BufferedReader(myReader);

    // check through the first line
    String line = intHunter.readLine();

    // If more line go ahead!
    while (line != null) {
        // System.out.println("Inside while loop1");
        StringTokenizer myTokenizer = new StringTokenizer(line, " ");

        while (myTokenizer.hasMoreTokens()) {
            // System.out.println("Inside while loop2");
            String text = myTokenizer.nextToken();
            try {
                quizArray[i] = Integer.parseInt(text);
                // print valid number
                System.out.println(quizArray[i]);
                // min & max
                sum += quizArray[i];
                i++;
                counter++;
                // System.out.println(quizArray[i]);
            } catch (NumberFormatException nfe) {
                continue;
            }
            // extract integers from a text file, then do the calculation.
        }
        average = (double) sum / counter;
        line = intHunter.readLine();
    }

    intHunter.close();

    System.out.println("The new file is: " + counter + " integers as:"
            + " sum = " + sum + " average " + average + "\n"
            + " The max value is " + getMaxValue(quizArray) + "\n"
            + " The min is " + getMinValue(quizArray));
}

// getting the maximum value
public static int getMaxValue(int[] array) {
    int maxValue = array[0];
    for (int i = 1; i < array.length; i++) {
        if (array[i] > maxValue) {
            maxValue = array[i];

        }
    }
    return maxValue;
}

// getting the miniumum value
public static int getMinValue(int[] array) {
    int minValue = array[0];
    for (int i = 1; i < array.length; i++) {
        if (array[i] < minValue) {
            minValue = array[i];
        }
    }
    return minValue;

}
}

Answer 1

您正在创建20的数组，因此，如果您指定的值小于20，则将其设置为0.

像：如果你提供数组

所以数组的15个元素中的其余部分为0，这就是为什么它给你答案0但是在最大数字中0为min是因此它运行良好。对于您的程序使用动态数组

方法和逻辑错误

1 个答案: