Question

我在上一个println中遇到了问题。我希望它打印上一个字符串打印的次数并将所有数字加在一起。因此，如果用户输入“3”，它将打印三次，然后将三个数字加在一起得到六个。有谁知道我怎么做到这一点？或者我做错了什么？

    import java.util.Scanner;

    public class LoveCS { 
        public static void main(String[] args) { 
            int limit; 
            Scanner scan = new Scanner(System.in);
            System.out.println("How many times should the string be printed? " );
            limit = scan.nextInt();  
            int count = 1; 
            while (count <= limit){ 
                System.out.println(+count+"I love hot chocolate!!"); 
                count++;    
            } 
            sum+=limit;
            System.out.println("Java printed this message: "+ limit+ " times." + "The sum of the numbers from 1 to " + (count-1) + " is " sum);

        } 
    }

Answer 1

您添加到总和的位置在循环之外，因此您只能获得最后一位。如果你将它移动到循环中，它应该工作。无论如何，你在哪里宣布总和？

Answer 2

import java.util.Scanner;

public class LoveCS {

    public static void main(String[] args) {
        int limit;
        Scanner scan = new Scanner(System.in);
        System.out.println("How many times should the string be printed? ");
        limit = scan.nextInt();
        int count = 1;
        int sum = 0;
        while (count <= limit) {
            sum += count;
            System.out.println("I love hot chocolate!!");
            count++;
        }
        System.out.println("Java printed this message: " + limit + " times." + "The sum of the numbers from 1 to " + (count - 1) + " is " + sum);
     }
}

Answer 3

而不是while循环：

int count = 1;
while (count <= limit) {
    // code inside loop
    count++;
}

使用for循环更简洁：

for (int count = 1; count <= limit, count++) {
    // code inside loop
}

它的代码更少，并且显而易见的是控制循环=更少的错误。

使用此将意味着更改到最后一行：

..."The sum of the numbers from 1 to " + limit + " is"... // change (count - 1) to limit

如何在Java方法中使用while循环并打印添加函数？

3 个答案: