Question

在java中我正在尝试制作一个程序来完成我的数学作业（不是为了实际作弊，只是想学习java）而且我有一个for循环让我得到给定数字的所有因素，但我可以＆＃ 39;弄清楚如何成对保存for循环的所有输出（如果可能的话）以便稍后在数学问题中进行测试来解决它，这里是代码。（将根据要求添加所需信息，首先发布）

import java.util.Scanner;

public class factoring {

public static void main(String[] args) {
    String varible;
    String secondOperator;
    String firstOperator;
    int power;
    int greatestCommonFactor;
    long factorTo;
    long factorBy;
    String factors = null;
    Scanner userInput = new Scanner(System.in);

    System.out.println("Please enter the greatest common factor (Default to 1)");
    greatestCommonFactor = userInput.nextInt();

    System.out.println("Please input the varible");
    varible = userInput.next();

    System.out.println("Please enter the power");
    power = userInput.nextInt();

    System.out.println("Please enter the first operator");
    firstOperator = userInput.next();

    System.out.println("Please enter what your factoring to");
    factorTo = userInput.nextInt();

    System.out.println("Please enter the second operator");
    secondOperator = userInput.next();

    System.out.println("Please enter what you're factoring by");
    factorBy = userInput.nextInt();

    for(int i = 1; i * i <= factorBy; i++) {
        if (factorBy % i == 0) {
            if (i * i != factorBy) factors = factorBy / i + " and " + i;
        } 
    }

}

}

Answer 1

有一种更简单的方法来计算最大的公因子或除数，称为欧几里德算法。

int gcd(int a, int b) {
    while(0 != b) {
        r = a%b; a = b; b = r;
    }
    return a;
}

Answer 2

您可以使用文件保存结果。

尝试以下代码

db=> SELECT EXTRACT(DOY FROM CURRENT_DATE)::int;
 date_part 
-----------
        41

如何保存for循环的所有输出 - java

2 个答案: