如何打印对象数组中的每个对象？ [复制]

Question

我创建了一个数据类型“Person”的数组。我试图让“ReadPerson()”方法返回 3 个“Person”对象。通过返回我的数组'personen'，我得到错误“无法将类型'Persoon []'转换为'Personen'。我对编程很陌生，所以我仍然不确定如何正确使用数组和结构。我试过返回personen [i]，但是'i'当然会在for循环之外未定义。我如何返回'Person'的3个对象？

    Persoon ReadPerson()
    {
        Persoon[] personen = new Persoon[3];

        for (int i = 0; i < personen.Length; i++)
        {
            personen[i].FirstName = LeesString("Enter first name: ");
            personen[i].SecondName = LeesString("Enter second name: ");
            personen[i].Residence = LeesString("Enter residence: ");
            personen[i].Age = LeesInt("Enter age: ", 0, 120);
            personen[i].Gender = LeesGeslacht("Enter gender (m/f): ");
            Console.Write("\n");
        }
        return personen[i];
    }

    void PrintPerson(Persoon p)
    {
        Console.Write("\n");

        Console.Write(p.FirstName + " " + p.SecondName + " ");
        PrintGeslacht(p.Gender);

        Console.Write("\n");
        Console.WriteLine("{0} jaar, {1}", p.Age, p.Residence);
    }

struct Persoon
{
    public string FirstName;
    public string SecondName;
    public string Residence;
    public int Age;
    public GeslachtType Gender;
}

Answer 1

正如目前所写，您的 for 循环只会执行一次，然后返回第一个人。

您收到“并非所有代码路径都返回值”错误，因为这正是发生的情况，您的方法的路径结束时没有返回，但方法签名需要返回类型。

看起来你想要这样的东西 -

void Main()
{
    var people = LeesPersoon();

    for (var i = 0; i < people.Length; i++)
    {
        PrintPerson(people[i]);
    }
}

void PrintPerson(Persoon p)
{
    Console.Write("\n");

    Console.Write(p.FirstName + " " + p.SecondName + " ");
    PrintGeslacht(p.Gender);

    Console.Write("\n");
    Console.WriteLine("{0} jaar, {1}", p.Age, p.Residence);
}

Persoon[] LeesPersoon()
{
     Persoon[] personen = new Persoon[3];

     for (int i = 0; i < personen.Length; i++)
     {
          personen[i].FirstName = LeesString("Enter first name: ");
          personen[i].SecondName = LeesString("Enter second name: ");
          personen[i].Residence = LeesString("Enter residence: ");
          personen[i].Age = LeesInt("Enter age: ", 0, 120);
          personen[i].Gender = LeesGeslacht("Enter gender (m/f): ");
          //Console.Write("\n");
     }

     return personen;
}