读取 number.txt 文件并找到平均值

Question

目前正在处理一项作业，我需要读入一个数字文件并显示数字的总数、偶数总数、奇数总数以及所有三个的平均值。我目前正在努力寻找偶数和奇数的平均值。我必须显示偶数的平均值和奇数的平均值。我通过使用 parseInt 将我读入的数字字符串转换为整数来找到总平均值，这样我就可以计算平均值但是当我尝试对偶数和奇数做同样的事情时，我无法让它工作

这是我当前的代码：

public class Homework1 {
  public static void main(String[] args) throws IOException {
  // reads file in
  File num = new File("numbers.txt");
  Scanner inputFile = new Scanner(num);
  // creates rounding object
  DecimalFormat rounding = new DecimalFormat("#.##");
  // neccesary variables
  int count = 0;
  double numbers =0;
  int evenNum =0;
  int oddNum =0;
  double avg;
  double evenAvg;
  double oddAvg;
  double sum = 0.0;
  double evenSum = 0.0;
  double oddSum = 0.0;

  // reads in numbers file until last line is read
  while(inputFile.hasNext())
  {
         String nums = inputFile.nextLine();
  // converts string to ints so numbers can be added
         sum += Integer.parseInt(nums);
  // converts string to ints to so odd/even nums can be distinguished
         numbers = Integer.parseInt(nums);
  // updates total number count
         count++;

  // separates evens from odds
  if(numbers % 2 == 0)
      {
         evenNum++;
         evenSum += Integer.parseInt(nums);
      }

      else
         oddNum++;
         evenSum += Integer.parseInt(nums);
   } 

   // calculates total num average
   avg = sum/count; 

  // evenAvg = 
 //  oddAvg =  

   // output of credentials and results

   System.out.println("There are " +count+ " numbers in the file"+"\n");
   System.out.println("There are " +evenNum+ " even numbers"+"\n");
   System.out.println("There are " +oddNum+ " odd numbers"+"\n");
   System.out.println("The total average value is " +rounding.format(avg)+"\n"); 
   System.out.println("The odd number average is " +rounding.format(evenAvg)+"\n");
   System.out.println("The even number average is " +rounding.format(oddAvg)+"\n");

}

输出：

There are 982 numbers in the file

There are 474 even numbers

There are 508 odd numbers

The total average value is 50362.43

Answer 1

好的，所以我更正了 if/else 语句并添加了括号，这解决了我遇到的问题

oddNum++;
         oddSum += Integer.parseInt(nums);