Question

我正在尝试让程序计算前四个完美数字。它编译，但是当我运行程序时，for循环似乎是不可见的。就像我查看调试器一样，看起来只是跳过for循环并且变量不存在。

public static void main(String[] args)
{
    int pNum = 2; // starting number to check
    int sum = 0; 

    for (int count = 1; count <= 4; count++) 
    {
        for (int factor = 1; factor < pNum; factor++)
        {
            if (pNum % factor == 0)
                sum += factor;
        }

        if (pNum == sum)
        {
            System.out.println(pNum + " is a perfect number.");
            count++;
        }

        pNum++; sum = 0;
    }
}

Answer 1

我认为您的调试器正在运行，尝试使用printoutput来检查循环是否正常工作

for(int count = 1; count <= 4; count++){
  System.out.println("count:"+count);

Answer 2

count = 1, pNum = 2, sum = 0
factor = 1, sum = 0
count = 2, pNum = 3, sum = 0
factor = 1, sum = 0
factor = 2, sum = 1
count = 3, pNum = 4, sum = 0
factor = 1, sum = 0
factor = 2, sum = 1
factor = 3, sum = 3
count = 4, pNum = 5, sum = 0
factor = 1, sum = 0
factor = 2, sum = 1
factor = 3, sum = 1
factor = 4, sum = 1

我的for循环似乎是看不见的

2 个答案: