Question

我将未分配的变量用于局部变量'a'

namespace ConsoleApplication36
{
    class Program
    {
        static void Main(string[] args)
        {
            float Salary, a;
            Salary= 300;

            if (Salary <= 100)
            a = Salary * 0; // a = amount paid
            Console.WriteLine("He Pays " + a);

            if (Salary <= 200)
            a = Salary * 5 / 100;
            Console.WriteLine("He Pays " + a);

            if (Salary <= 500)
            a = Salary * 10 / 100;
            Console.WriteLine("He Pays " + a);

            if (Salary > 500)
            a= Salary*15/100;
            Console.WriteLine("He Pays " + a);
            Console.In.ReadLine();

    }
  }
}

Answer 1

使用当前语法，您将根据salary的值覆盖您的变量几次。你确定这是你想要的吗？如果没有，请确保在else子句中执行替代计算：

namespace ConsoleApplication36
{
class Program
{
    static void Main(string[] args)
    {
        float Salary = 300;
        float a = 0;

        if (Salary <= 100)
        {
            a = Salary * 0; // a = amount paid
        }
        else if (Salary <= 200)
        {
            a = Salary * 5 / 100;
        }
        else if (Salary <= 500)
        {
            a = Salary * 10 / 100;
        }
        else
        {
            a = Salary*15/100;
        }

        Console.WriteLine("He Pays " + a);
        Console.In.ReadLine();

    }
}
}

Answer 2

在使用之前，您需要指定a变量。改变这一行

float Salary, a;

到这个

float Salary, a = 0;

以下是完整的修改代码

namespace ConsoleApplication36
{
    class Program
    {
        public static void Main()
        {
            float Salary, a = 0;
            Salary= 300;
            if (Salary <= 100)
                a = Salary * 0; // a = amount paid

            Console.WriteLine("He Pays " + a);

            if (Salary <= 200)
                a = Salary * 5 / 100;
            Console.WriteLine("He Pays " + a);

            if (Salary <= 500)
                a = Salary * 10 / 100;
            Console.WriteLine("He Pays " + a);

            if (Salary > 500)
                a = Salary*15/100;
            Console.WriteLine("He Pays " + a);
            Console.In.ReadLine();

        }
    }
}

演示：https://dotnetfiddle.net/YeljrN

Answer 3

设置等于0的初始值

namespace ConsoleApplication36
{ 
    class Program { 
    static void Main(string[] args) { 
    float Salary, a = 0; Salary= 300; if (Salary <= 100)

                    a = Salary * 0; // a = amount paid

                Console.WriteLine("He Pays " + a);

                if (Salary <= 200)
                    a = Salary * 5 / 100;
                Console.WriteLine("He Pays " + a);

                if (Salary <= 500)
                    a = Salary * 10 / 100;
                Console.WriteLine("He Pays " + a);

                    if (Salary > 500)
                        a= Salary*15/100;
                    Console.WriteLine("He Pays " + a);
                    Console.In.ReadLine();


            }
        }
        }

Answer 4

最好单独声明它们，因为你是C＃

的新手

浮动薪水; float a = 0;

错误是因为CLR足够聪明，可以在到达特定的局部变量使用之前检查代码所采用的路径，如果你可以在没有分配值的情况下到达那里就会抱怨。

将未分配的变量用于局部变量＆＃39; a＆＃39;

4 个答案: