不能在 switch 语句之外使用声明的变量

Question

我在 switch 语句外声明了一个变量，然后在 switch 语句内向这些变量添加了内容。之后，我尝试使用语句外的变量，但它无法识别我已经放入变量中的答案。有什么想法吗？

               int hp;
               int dmg;
               int dfn;
            switch (className)
            {
                case "Warrior":
                    Adventurer ch1 = new Adventurer(13, 40, 10);
                    dmg = ch1.damage;
                    hp = ch1.health;
                    dfn = ch1.defense;
                    break;
                case "Mage":
                    Adventurer ch2 = new Adventurer(17, 20, 3);
                    dmg = ch2.damage;
                    hp = ch2.health;
                    dfn = ch2.defense;
                    break;
                case "Druid":
                    Adventurer ch3 = new Adventurer(10, 30, 4);
                    dmg = ch3.damage;
                    hp = ch3.health;
                    dfn = ch3.defense;
                    break;
                case "Thief":
                    Adventurer ch4 = new Adventurer(20, 15, 1);
                    dmg = ch4.damage;
                    hp = ch4.health;
                    dfn = ch4.defense;
                    break;
                default:
                    Console.WriteLine("There doesn't exist a class with that name, please try again:");
                    className = Console.ReadLine();
                    break;
            }
            Console.WriteLine(hp);

Answer 1

我认为您可能会因为“使用未分配的局部变量”而得到 error/warning，因为您还没有初始化它。如果是这种情况，请在 switch

之前为局部变量赋值

int hp = 0;
int dmg = 0;
int dfn = 0;

不能在 switch 语句之外使用声明的变量

Can't use a declared variable outside of a switch statement

c#

integer

switch-statement