我如何分配剩余的组？

Question

嘿，我是编程新手，想知道如何使用 if 语句和模块编写这段代码。 我知道如何做第一部分，但我仍然坚持如何将其余学生分配到小组的 rest 中。 到目前为止，我的程序在下面：

package grouping.problem;
import java.util.Scanner;

public class GroupingProblem {
public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    System.out.println("Enter the number of students: ");
    int students = sc.nextInt();
    System.out.println("Enter the number of groups: ");
    int groups = sc.nextInt();
    int groupsmade;
    int randomgroups;
    int studentin = 0;
    int remainder;
if (students<=0 || groups<=0){
    System.out.println("Invalid Input");
    System.exit(0);
}
if (students%groups == 0){
    studentin = students/groups;
    groupsmade = students/studentin;
    System.out.println("There are " + groupsmade + " groups of " + studentin + " students each");
}else if (students % groups != 0){
    remainder = (students % groups);
    System.out.println("Not an even amount of students");
}

} }

Answer 1

students % groups的值是有多少组会有一个额外的学生：

import java.util.Scanner;

public class GroupingProblem {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Input number of students: ");
        int students = scanner.nextInt();
        System.out.print("Input number of groups: ");
        int groups = scanner.nextInt();
        if (students <= 0 || groups <= 0) {
            System.out.println("Invalid Input");
            System.exit(1);
        }
        int studentsLeftAfterEvenDistribution = students % groups;
        int baseGroupSize = students / groups;
        int groupsWithBaseGroupSize = groups - studentsLeftAfterEvenDistribution;
        System.out.printf("There %s %d group%s of %d student%s each.%n",
                areOrIs(groupsWithBaseGroupSize), groupsWithBaseGroupSize,
                possiblyAddStoPluralize(groupsWithBaseGroupSize), baseGroupSize,
                possiblyAddStoPluralize(baseGroupSize));
        if (studentsLeftAfterEvenDistribution != 0) {
            System.out.printf("There %s %d group%s of %d student%s each.%n",
                    areOrIs(studentsLeftAfterEvenDistribution), studentsLeftAfterEvenDistribution,
                    possiblyAddStoPluralize(studentsLeftAfterEvenDistribution), baseGroupSize + 1,
                    possiblyAddStoPluralize(baseGroupSize + 1));
        }
    }

    private static String areOrIs(int groups) {
        return groups != 1 ? "are" : "is";
    }

    private static String possiblyAddStoPluralize(int num) {
        return num != 1 ? "s" : "";
    }

}

用法示例 1：

Input number of students: 20
Input number of groups: 4
There are 4 groups of 5 students each.

用法示例 2：

Input number of students: 22
Input number of groups: 5
There are 3 groups of 4 students each.
There are 2 groups of 5 students each.

用法示例 3：

Input number of students: 3
Input number of groups: 5
There are 2 groups of 0 students each.
There are 3 groups of 1 student each.

用法示例 4：

Input number of students: 0
Input number of groups: 10
Invalid Input

用法示例 5：

Input number of students: 5
Input number of groups: 4
There are 3 groups of 1 student each.
There is 1 group of 2 students each.