如何将三个while循环链接在一起？ [英] How do I link three while loops together?

问题描述

嗨所有

我目前有一个使用三个while循环的程序，但是当程序运行时它只执行其中一个条件，例如我的程序有一个寻找奇数的循环，非常感谢偶数和数字的数量

hi all
I currently have a program which is using three while loops but when the program runs it only does one of the criteria so for example my program has a loop for looking for odd numbers,even numbers and the amount of numbers any help would be greatly appreciated

import java.util.Scanner;

/**
 *
 * @author Adam
 */
public class OddEvenAverage2 {

    public static void main(String[] args) {
        Scanner Scan = new Scanner (OddEvenAverage2.class.getResourceAsStream("Numbers.txt"));
        int evensum = 0;
        int evencount = 0;
        int numbersCounter = 0;
        int oddsum = 0;


while(Scan.hasNext()){
    Scan.next();
    numbersCounter++;
}


while (Scan.hasNext()){ //Starts the while loop
            // Read the next number.
          int numList = Scan.nextInt();
          if (numList %2== 0 ) {    // checks if the number can be divided by 2
             evensum += numList;
          }
}
while (Scan.hasNext()){ //Starts the while loop
            // Read the next number.
          int numList2 = Scan.nextInt();

          if (numList2 %2== 1 ) {    // checks if the number can be divided by 2
             oddsum += numList2;

           }
System.out.println("Number of words: " + numbersCounter);
System.out.println("Even number total is " + evensum);
System.out.println("odd number total is " + oddsum);
}
}
}

推荐答案

您在第一次使用扫描仪时会消耗扫描仪的来源-环。以下Scan.hasNext（） - 调用返回false，因为扫描程序到达源的末尾。没有办法重置扫描仪到开头，给你两个选项：



1）所有计数都在一个循环中。



2）为每个循环创建一个新的扫描程序。

You consume the source of the scanner during the first while-loop. The following Scan.hasNext()-calls return false because the scanner reached the end of the source. There's no way to reset a scanner to the beginning, leaving you with two options:

1) Do all counting in a single loop.

2) Create a new scanner for each loop.

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