Java 加法程序，它使您输入的数字相加，直到您输入零。 SumPositive 和 SumNegative 的平均值

Question

在这个 java 程序中，您（用户）不断输入数字，直到您输入零，此时列表终止。它将计算正偶数之和以及奇偶数和负数之和。它还会计算平均值。

我卡在求偶数和、奇数和以及负数和的平均值的部分。

import java.util.*;
class sumPositiveAverage {
    public static void main (String[] args) {
        Scanner sc = new Scanner (System.in);
        System.out.println ("Enter numbers. List terminates when you enter a zero. 

        Enter a zero when you want to begin the addition.");
        int a = sc.nextInt();
        int esum=0;
        int osum=0;
        int nsum=0;
        while (a !=0)
        {
            if (a>0)
            {
                if (a%2==0)
                {
                    esum = esum+a;
                }// end of 3rd innermost if statement
                else
                {
                osum = osum+a;
                }// end of 3rd else statement
            }//end of 2nd middle if-else-loop
            else if (a<0)
            {
                nsum=nsum+a;
            }//end of 2nd middle else statement
        }//end of while loop
        System.out.println ("The sum of even positive numbers is "+esum);
        System.out.println ("The sum of odd positive numbers is "+osum);
        System.out.println ("The sum of negative numbers is "+nsum);
    }//end of main
}//end of class2

Answer 1

import java.util.*;

public class sumPositiveAverage {

public static void main(String[] args)
{
   int sum_even = 0;
   int sum_odd = 0;
   int sum_negative = 0;
   int sum_positive = 0;

   int count_even = 0;
   int count_odd = 0;
   int count_negative = 0;
   int count_positive = 0;

   double avg_sum_even = 0;
   double avg_sum_odd = 0;
   double avg_sum_negative = 0;
   double avg_sum_positive = 0;

   int sum = 0;
   int count = 0;
   Scanner input = new Scanner(System.in);
   int data = 0;
   do
   {
       System.out.print("Type in a positive or negative number and press enter key, if 0 is entered program stops: ");
       data = input.nextInt();


       if(data > 0){

           if(data%2 == 0){
           //even number
           sum_even = sum_even + data;
           count_even++;
           }else{

               //odd
               sum_odd = sum_odd + data;
               count_odd++;

           }

           sum_positive = sum_positive + data;
           count_positive++;
       }else if(data < 0) {

           //negative number
       sum_negative = sum_negative + data;
       count_negative++;

       }


    }
    //Stops if the value of data is ZERO(0) and continues if it's not
    while(data != 0);

   //here means zero has been entered

     if(count_positive > 0) { avg_sum_positive = (double)sum_positive/count_positive; }
     if(count_negative > 0) { avg_sum_negative = (double)sum_negative/count_negative; }
     if(count_even > 0) { avg_sum_even = (double)sum_even/count_even; }
     if(count_odd > 0) { avg_sum_odd = (double)sum_odd/count_odd; } 


     System.out.println("Sum of Positive Numbers = " + sum_positive);
     System.out.println("Sum of negative Numbers = " + sum_negative);
     System.out.println("Sum of odd Numbers = " + sum_odd);
     System.out.println("Sum of even Numbers = " + sum_even);

     System.out.println("Count of Positive Numbers = " + count_positive);
     System.out.println("Count of negative Numbers = " + count_negative);
     System.out.println("Count of odd Numbers = " + count_odd);
     System.out.println("Count of even Numbers = " + count_even);

     System.out.println("Average of Positive Numbers = " + avg_sum_positive);
     System.out.println("Average of negative Numbers = " + avg_sum_negative);
     System.out.println("Average of odd Numbers = " + avg_sum_odd);
     System.out.println("Average of even Numbers = " + avg_sum_even);


}//closing main
} // closing class

Java 加法程序，它使您输入的数字相加，直到您输入零。 SumPositive 和 SumNegative 的平均值

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