我是一個新的Java。我已經添加了while條件，但日食仍然要求它

Question

我是新來的java和我堅持非常簡單的代碼。我已經添加了while條件，但日食仍然要求它。

錯誤：

Syntax error, insert while (Expression); to complete BlockStatements

代碼：

package assignment517; 
import java.util.Scanner; 

public class Products { 
    public static void main(String[] args) { 
    // TODO Auto-generated method stub 
    do{ 
     Scanner input = new Scanner(System.in); 
     System.out.print("Enter the number of product"); 
     int numberOfProduct=input.nextInt(); 
     System.out.print("Enter the products sold"); 
     int productsSold=input.nextInt(); 

     double pprice = 1.0; 

     switch(numberOfProduct){ 
     case 1: { 
      System.out.print("Price of total products sold"); 
      System.out.print (pprice= 2.98*productsSold); 
      break; 
     } 

     case 2: { 
      System.out.print("Price of total products sold");   
      System.out.print(pprice= 4.50*productsSold); 
      break; 
     } 

     case 3: { 
      System.out.print("Price of total products sold"); 
      System.out.print(pprice= 9.98*productsSold); 
      break; 
     } 

     case 4: { 
      System.out.print("Price of total products sold"); 
      System.out.print(pprice= 4.49*productsSold); 
      break; 
     } 

     case 5:{ 
      System.out.print("Price of total products sold"); 
      System.out.print(pprice= 6.87*productsSold); 
      break; 
     } 

     default:{ 
      System.out.print("invalid value"); 
     } 

     }while(numberOfProduct !=6); 
    } 
    } 

Answer 1

你while是放錯了地方 - 它應該是不switch的do結束後}，。請注意，由於它依賴於numberOfProduct變量，因此您需要將其定義移至do-while循環之外。