Question

我需要创建一个程序，以根据用户输入的数组值输出最小，最大，平均值，总体标准偏差和样本标准偏差。

import java.util.Scanner;
public class {

/**
 * @param args the command line arguments
 */
public static void main(String[] args) {
    // TODO code application logic here
    Scanner input = new Scanner(System.in);



    System.out.println("How many of the type double do you want to store"
            + " in your array?: ");
    int number = input.nextInt();

    double[] arrayofvals = new double[number];
    double total = 0;

    for (int i = 0; i < number; i++){
        System.out.print("Enter value " + (i+1) + " : ");
            arrayofvals[i] = input.nextDouble();


    }
     {


    }

    System.out.print("----------------------------------------\nHere are "
            + "the stats for your values: \n------------------------------"
            + "----------");
    double max = getMax(arrayofvals);
    System.out.println("\nMaximum value is: " +max);

    double min = getMin(arrayofvals);
    System.out.println("\nMinimum value is: " + min);

    double average = getMean (arrayofvals);
    System.out.println("\nAverage of array values is: " + total);



}
public static double getMax(double[] arrayofvals){
    double maxValue = arrayofvals[0];
    for(int i=1;i < arrayofvals.length; i++){
        if(arrayofvals[i] > maxValue){
            maxValue = arrayofvals[i];
        }
    }
    return maxValue;
}
public static double getMin(double[] arrayofvals){
    double minValue = arrayofvals[0];
    for(int i=1;i < arrayofvals.length; i++){
        if(arrayofvals[i] < minValue){
            minValue = arrayofvals[i];
        }
    }
    return minValue;
}

public static double getMean (double[] arrayofvals){
    double total = 0;

    double avgVal = arrayofvals[0];
for (int i =0; i< arrayofvals.length; i++){
total = total + arrayofvals[i];
    }
 double average = total / arrayofvals.length;
return avgVal;


}

}

我无法超越平均计算，因为我一直得到0的回报。我不知道我在做什么错。任何帮助或建议，我们将不胜感激。

Answer 1

retutn平均值，而不是avgVal;

public static double getMean (double[] arrayofvals){
    double total = 0;   
    for (int i =0; i< arrayofvals.length; i++){
       total = total + arrayofvals[i];
    }
    double average = total / arrayofvals.length;
    return average;
}

，并以main的平均值打印，而不是total

 double average = getMean (arrayofvals);
 System.out.println("\nAverage of array values is: " + average);// replaced total with average

数组中的统计程序

1 个答案: