Question

我必须修改我的程序，以便不断提示每个租赁的分钟数，直到价值介于60和7,200之间（含）。所以我要做的是在for循环之间输入输入的提示，但每次我都这样做。我的程序告诉我找不到符号，即使它的全局和我在for循环中使用它。我只是想知道如何循环分钟，然后我将添加，如果条件检查它是否在60和7200之间，并打破循环。

import java.util.Scanner;

public class RentalDemo
{
public static void main(String[] args)
{

   Scanner input = new Scanner(System.in);

    String contractName;
    int mins;

   //getting inputs

   //HERE IS THE PROBLEM, IF I TAKE THE FOR LOOP OUT IT WILL WORK FINE BUT ONLY ONCE.
   for (int x=0;x<10;x++)
   {
   System.out.println("Please enter contractName"); 
   contractName = input.nextLine(); 



   System.out.println("Please enter mins");
    mins = input.nextInt();
   }

    //object name
    Rental mike = new Rental(contractName, mins);

   //to clear buffer 
   input.nextLine(); 

   //getting inputs 
   System.out.println("Please enter contractName"); 
   contractName = input.nextLine(); 

   System.out.println("Please enter mins");
   mins = input.nextInt();

    //object name
    Rental luke = new Rental(contractName,mins);

    //to clear buffer 
    input.nextLine(); 

     //getting inputs 
     System.out.println("Please enter contractName"); 
     contractName = input.nextLine(); 

     System.out.println("Please enter mins");
     mins = input.nextInt();

     //object name
     Rental ihab = new Rental(contractName,mins);




    //outputs

    System.out.println("Contract Number: " + mike.getContractNumber()+ " \nHours: "+mike.getHours()+ " Minutes: " +mike.getMins()+
    "\nTotal Price: " +mike.getPrice());


    System.out.println("\nContract Number: " + luke.getContractNumber()+ " \nHours: "+luke.getHours()+ " Minutes: " +luke.getMins()+
    "\nTotal Price: " +luke.getPrice());

     System.out.println("\nContract Number: " + ihab.getContractNumber()+ " \nHours: "+ihab.getHours()+ " Minutes: " +ihab.getMins()+
    "\nTotal Price: " +ihab.getPrice());



   //methods

   int highest = compare(mike,luke);
   int highest2 = compare(ihab,mike);
   int highest3 = compare(luke,ihab);

   if (highest > highest2 && highest > highest3)
   {
      System.out.println("\nContract Number:"+ mike.getContractNumber()+ " is the greater");
   }
   else if (highest2 > highest && highest2 > highest3)
   {
      System.out.println("\nContract Number:" +ihab.getContractNumber()+ " is the greater");

   }
   else 
   {
     System.out.println("\nContract Number:" +luke.getContractNumber()+ " is the greater");

   }




 }



 public static int compare(Rental ob1, Rental ob2)
 {


     int mins;  
   if ((ob1.getHours() > ob2.getHours()) || ob1.getMins() > ob2.getMins())
   {
         mins = ob1.getHours()*60 + ob1.getMins(); 

         return mins;

   }

   else
   { 
          mins = ob1.getHours()*60 + ob1.getMins(); 
     return mins;
   }
 }   
 }

Answer 1

for (int x=0;x<10;x++)
{
   System.out.println("Please enter contractName"); 
   contractName = input.nextLine(); 



   System.out.println("Please enter mins");
   mins = input.nextInt();
   if(mins > 60 && mins < 7200)
       break;
}

使用'break'打破循环。此外，for循环每次只替换每个变量，使其仅存储x = 9上的值。如果需要mins和contractName的每个值，请使用数组。我不明白您的符号超出范围错误，您可以粘贴错误输出吗？

超出范围的java符号

1 个答案: