Question

我有下一个代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Maman15cs
{
    public class ClassRoom
    {
        public string ClassNumber;
        public int NumberofPlaces;
        public int[,] DayandHour = new int[6,8];

        public void AddClassRoom()
        {
            Console.WriteLine("Enter the Class number, the Number of places\n");
            ClassNumber = Console.ReadLine().ToString();
            NumberofPlaces = int.Parse(Console.ReadLine());
            Console.WriteLine("Good, now enter the Day(1, 2, 3, 4, 5, 6) and after that you put the courses' number that are that day (In Order)");
            for (int i = 0; i < 6; i++)
            {
                for (int j = 0; j < 8; j++)
                {

                    DayandHour[i,j] = int.Parse(Console.ReadLine());

                }

            }
        }

    }

    public class Course
    {
        public string CourseName;
        public int CourseNumber;
        public int StudentsNumber;
        public string TeacherName;
        public string ClassNumber;

        // Tuple<string, int, int, string, string>

        public void AddCourse(Course *course)
        {
            Console.WriteLine("Enter the Course's name, course's number, students number, teacher's name, and class' number\n");
            CourseName = Console.ReadLine().ToString();
            CourseNumber = int.Parse(Console.ReadLine());
            StudentsNumber = int.Parse(Console.ReadLine());
            TeacherName = Console.ReadLine().ToString();
            ClassNumber = Console.ReadLine().ToString();

        }
    }

    public class Program
    {

         void Main()
        {
            Course[] course = new Course[1000];
            ClassRoom[] classroom = new ClassRoom[1000];
            Course* coursePointer;


            int actionChoice;
            int courseCount = 0, classroomCount = 0;

             loop:

             Console.WriteLine("What do you want to do? (Enter number): \n  1) Add a new Course \n 2)Add a new class room \n 3)Add an existing class to an existing classroom \n 4)Read the information of a specific classroom \n 5)Read the information of all the classrooms \n 6)Read the information of a specific course \n 7)Delete a specific course \n 8)Update courses in the Time Table \n 9)Exit the program  \n");
             actionChoice = int.Parse(Console.ReadLine());

             switch (actionChoice)
             {

                 case 1: //Add a new Course

                    // course[classroomCount].AddCourse();

                   break;


             }

             goto loop;

        }
    }
}

我希望AddCourse函数返回或使用指针将输入添加到变量过程中，我尝试了一些像list＆lt;＆gt;但我对此并不熟悉。

Answer 1

更改AddCourse以创建新的Course并将其返回。

public Course AddCourse()
{
     var course = new Course();
     course.CourseName = Console.ReadLine().ToString();
     // ... more readlines
     return course;
 }

在Main：

List<Course> courses = new List<Course>();

case 1: courses.Add(AddCourse()); break;

Answer 2

首先，设置一个列表来保存所有课程，而不一定是数组（除非你真的需要一个数组）：

List<Course> Courses = new List<Courses>();

更改AddCourse方法返回一个新实例化的Course对象：

Public Course AddCourse(){

Course newCourse = new Course();
<logic to populate the object>

return newCourse;

}

在您要添加课程的循环中，只需执行与此类似的操作：

Courses.add(AddCourse());

然后你可以使用任何循环结构来完成所有课程或linq以获得你需要的特定课程。

---编辑 -

由于您坚持使用课程类的设置方式（这不是btw的最佳实践），您需要将AddCourse方法更改为：

 public class Course
    {
        public string CourseName;
        public int CourseNumber;
        public int StudentsNumber;
        public string TeacherName;
        public string ClassNumber;
        public void AddCourse()
        {
            Console.WriteLine("Enter the Course's name, course's number, students number, teacher's name, and class' number\n");
            this.CourseName = Console.ReadLine().ToString();
            this.CourseNumber = int.Parse(Console.ReadLine());
            this.StudentsNumber = int.Parse(Console.ReadLine());
            this.TeacherName = Console.ReadLine().ToString();
            this.ClassNumber = Console.ReadLine().ToString();

        }
    }

然后循环方法中的调用需要像这样：

Course NewCourse = new Course();
Courses.Add(NewCourse.AddCourse());

Answer 3

从C切换到C＃后我遇到了类似的问题：）

首先，您可以将Course[] course = new Course[1000];替换为var course = new List<Course>();。 List<T>对于大多数情景来说要好得多 - 它没有确切的大小，您可以在任何位置添加任何数量的元素“动态”。

其次，所有类实例都作为引用传递。指针仅适用于一些罕见的风格。

第三。 goto几乎从未在C＃中使用过。语言中有大量的循环，枚举器等 - foreach，而

最后。在你的情况下，我会这样做：

public class Course
{
    public string CourseName;
    public int CourseNumber;
    public int StudentsNumber;
    public string TeacherName;
    public string ClassNumber;

    public static Course ReadCourse()
    {
        var rez = new Course();

        Console.WriteLine("Enter the Course's name, course's number, students number, teacher's name, and class' number\n");
        rez.CourseName = Console.ReadLine().ToString();
        rez.CourseNumber = int.Parse(Console.ReadLine());
        rez.StudentsNumber = int.Parse(Console.ReadLine());
        rez.TeacherName = Console.ReadLine().ToString();
        rez.ClassNumber = Console.ReadLine().ToString();

        return rez;
    }
}

public class Program
{   
    void Main()
    {
        var courses = new List<Course>();

        int actionChoice;
        while(1=1)
        {
            Console.WriteLine("What do you want to do? (Enter number): \n  1) Add a new Course \n 2)Add a new class room \n 3)Add an existing class to an existing classroom \n 4)Read the information of a specific classroom \n 5)Read the information of all the classrooms \n 6)Read the information of a specific course \n 7)Delete a specific course \n 8)Update courses in the Time Table \n 9)Exit the program  \n");
            actionChoice = int.Parse(Console.ReadLine());

            switch (actionChoice)
            {

                case 1: //Add a new Course
                    var new_course = Course.ReadCourse();
                    courses.Add(new_course);    
                    break;

                case 9: // Exit
                    return;
                default:
                    Console.WriteLine("Wrong input");
            }
        }
    }
}

这里有趣的是什么。静态方法Course.ReadCourse，它读取并返回课程的新实例。 default中的switch选择器。 return退出应用。 List<T>作为课程的存储空间。 new Course()命令使用自动创建的隐式构造函数，因为没有定义任何构造函数。

如何从函数中检索输入

3 个答案: