Question

我正在努力做得更好，所以我从这里开始。问题是当我尝试使用else进行测试时，它无法打印。程序到此结束。有人知道为什么吗？

 import java.util.Scanner;
    public class CuentaBancaria
   {
       public static void main(String args[])
      {
         double EstatusDelBalance = 0.00, Balance = 0.00, Deposito = 0.00, Retiro = 0.00;
         Scanner vgd = new Scanner(System.in);
         System.out.println("Tu balance actual es: 0");
         {
            if (EstatusDelBalance <= Balance)
            {
               System.out.println("\nCuanto desea depositar? ");
               Deposito = vgd.nextDouble();
               Balance = Deposito + Balance;
               System.out.println("\nCuanto desea retirar? ");
               Retiro = vgd.nextDouble();
               Balance =  Balance-Retiro;
               EstatusDelBalance = Balance;
            }
            else 
            {
               System.out.print("No hay balance suficiente para el retiro");
            }
         }
      }
   }

Answer 1

0.0是Balance，0.0是EstatusDelBalance <= Balance，所以class Submission extends Model { public function items() { return $this->belongsToMany('App\Item')->withPivot('amount'); } } class Item extends Model { public function Submissions() { return $this->belongsToMany('App\Submission')->withPivot('amount'); } }将始终为真。您可能要使用while loop来解决此问题。

Answer 2

否则将永远不会打印else，因为EstatusDelBalance = Balance。否则，只有在EstatusDelBalance> Balance时才打印。

但是我想您会丢失某些内容，因为这里还有多余的{}，这些多余的import java.util.Scanner; public class CuentaBancaria { public static void main(String args[]) { double EstatusDelBalance = 0.00, Balance = 0.00, Deposito = 0.00, Retiro = 0.00; Scanner vgd = new Scanner(System.in); System.out.println("Tu balance actual es: 0"); ??? -> { if (EstatusDelBalance <= Balance) { System.out.println("\nCuanto desea depositar? "); Deposito = vgd.nextDouble(); Balance = Deposito + Balance; System.out.println("\nCuanto desea retirar? "); Retiro = vgd.nextDouble(); Balance = Balance-Retiro; EstatusDelBalance = Balance; } else { System.out.print("No hay balance suficiente para el retiro"); } ??? -> } } }是不必要的（但是如果有循环，则是必需的）……在'???'行中。

@{ Html.RenderAction("ViewCategory", "Books", 
    new {param1 = "value1", param2 = "value2" }); }

Answer 3

如果要使else块可执行，请检查一下。我想这就是您所期望的。

    import java.util.Scanner;
    public class CuentaBancaria
    {
       public static void main(String args[])
      {
         double EstatusDelBalance = 0.00, Balance = 0.00, Deposito = 0.00, Retiro = 0.00;
         Scanner vgd = new Scanner(System.in);
         System.out.println("Tu balance actual es: 0");
         System.out.println("\nCuanto desea depositar? ");
         {
             Deposito = vgd.nextDouble();
             Balance = Deposito + Balance;
             System.out.println("\nCuanto desea retirar? ");
             Retiro = vgd.nextDouble();
             Balance =  Balance-Retiro;
             if (EstatusDelBalance <= Balance)
             {
             EstatusDelBalance = Balance;
             }
             else 
             {
             System.out.print("No hay balance suficiente para el retiro");
             }
     }
  }
}

否则什么也没打印

3 个答案: