Question

我创建的方法中的奇怪问题。我无法返回pointer变量。

public static int serch_Acount(List<Accounts> AllAccount)
{
    int pointer;   
    Console.WriteLine("please enter the id number");
    int idSerch = Convert.ToInt32(Console.ReadLine());
    for (int i = 0; i < AllAccount.Count ; i++)
    {
        if (idSerch ==AllAccount[i].id)
        {
            Console.WriteLine("name: "+AllAccount[i].accountName);
            Console.WriteLine("id: " + AllAccount[i].id);
            Console.WriteLine("age: " + AllAccount[i].age);
            Console.WriteLine("balance: " + AllAccount[i].balance);
            pointer = i;
        }
        else
        {
            Console.WriteLine("id doent found");
            pointer= -1;
        }
    }
    return pointer;
}

使用未分配的局部变量pointer

Answer 1

如果- df[["a", "b"]].diff(axis=1)["b"]为空，则循环将永远不会执行，也不会为AllAccount赋值。

查看您的代码，我怀疑您可以在声明时将其设置为pointer来轻松解决此问题：

-1

Answer 2

1：您的指针应带有-1，0，默认值之类的值

2：如果发现任何东西，则必须返回，否则下一个发射器将更改您的指针

    public static int serch_Acount(List<Accounts> AllAccount)
    {
        int pointer = default; // does not need
        Console.WriteLine("please enter the id number");
        int idSerch = Convert.ToInt32(Console.ReadLine());
        for (int i = 0; i < AllAccount.Count; i++)
        {
            if (idSerch == AllAccount[i].id)
            {
                Console.WriteLine("name: " + AllAccount[i].accountName);
                Console.WriteLine("id: " + AllAccount[i].id);
                Console.WriteLine("age: " + AllAccount[i].age);
                Console.WriteLine("balance: " + AllAccount[i].balance);
                pointer = i; // does not need
                return pointer;
                // return i;
            }
            Console.WriteLine("id doent found");
            pointer = -1; // does not need
        }
        return pointer;
        // return -1;
    }

如何解决方法变量中的问题

2 个答案: