我对while循环感到困惑吗？您能否说出while循环内的条件是什么？即（）？ [关闭]

Question

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[2天前关闭。

//Find the number of odd, evens, and zeros digits from integers value given from keyboard

import java.util.Scanner;

public static void main(String[] args) 

    int number, countOdds = 0, countEvens = 0, countZeros = 0;
    Scanner input = new Scanner(System.in);

    //Take input from users
    System.out.print("Enter a number from 0 to 100 : ");
    number = input.nextInt();

    //Conditions 

    do {
        int checkNum = num % 10;
        if(checkNum % 2 == 0) {
            countEvens++;
        }
        else if(checkNum == 0) {
            countZeros++;
        }
        else {
            countOdds++;
        }

        num /= 10;

    }while(num >= 0);

    System.out.print("Evens are : " + countEvens);
    System.out.print("Odds are : " + countOdds);
    System.out.print("Zeros are : " + countZeros);

Answer 1

由于零是偶数，所以您的解决方案会将所有零算作偶数，并且countZeros变量将永远不会递增。

您需要切换条件的顺序：

do {
    int checkNum = num % 10;
    if(checkNum == 0) {
        countZeros++;
    }
    else if(checkNum % 2 == 0) {
        countEvens++;
    }
    else {
        countOdds++;
    }

    num /= 10;
} while(num >= 0);