使用循环打印出每个月的租金，阈值 [关闭]

Question

使用循环从数组中打印出低于用户输入阈值的每个月租金

这是我从讲师那里收到的问题，我需要帮助，因为我根本不知道从哪里开始。这是我的完整程序代码，这是最后一种情况。

import java.util.Scanner ;
public class jakeGrim {

  public static void  main(String[] args) {
                // Local variable

                int option;
                String squareFootage="";

                int noBed = 0;

                double totalSum =0;

                String propertyCode="";

                String propertyType="";

                String threshold="";


                Scanner input = new Scanner( System.in );
                Scanner user_input = new Scanner( System.in );
                double[] array = new double[12]; 

  do{
            // Display menu graphics
            System.out.println(" ");
            System.out.println("|  *****Rental Menu*******   |");
            System.out.println("|        1. Enter rental property Details     ");
            System.out.println("|        2. Enter monthly rent ( 12 Months )       ");
            System.out.println("|        3. Display Annual Rent");
            System.out.println("|        4. Display rental report       ");
            System.out.println("|        5. Display Monthly rents falling below a certain threshold       ");
            System.out.println(" ");
            System.out.println(" Please Select an option: ");
            option = input.nextInt();


  {

    switch (option) {


   case 1:


            System.out.println("Enter Rental Details: ");
            System.out.println("Property Code:            ");
            propertyCode = user_input.next();
            System.out.println("Property Type:            ");
            propertyType = user_input.next();
            System.out.println("Square Footage:           ");
            squareFootage = user_input.next();
            System.out.println("Number Of bedrooms        ");
            noBed = input.nextInt();
            break;


      case 2:

     {
         Scanner keyboardScanner = new Scanner(System.in); 

         for (int i = 0; i < 12; i++) {
          System.out.println("Enter Rental for month[" +( i +1)+ "]");
          array[i] = keyboardScanner.nextDouble();
}




        //So now, we need to do something with that array and sum up all the values in that array. 
        for (int i = 0; i < array.length; i++){
          System.out.println(array[i]);

         totalSum += array[i];
}
}




 break;


     case 3:
         System.out.println("The annual rent for propery code "+propertyCode+" is:  " +(totalSum));


break;

    case 4:

        System.out.println(" Property Code:      "+propertyCode);
        System.out.println(" Property Type:      "+propertyType);
        System.out.println(" Square Footage:     "+squareFootage);
        System.out.println(" Number of Bedrooms: "+noBed);
        System.out.println("");
        System.out.println("");
        for(int i = 0; i<12; i++)
            System.out.println("Rental for month " + (i+1) + " : " + array[i]);


    case 5:

         Scanner user_input = new Scanner( System.in );

        System.out.println("Enter the Rental Threshold: ");
        threshold = user_input.next();

        System.out.println("


    break;
    default:
        System.out.println("Invalid selection");
      break; 
     }
  }
}while (option!=0);
}
}

Answer 1

嗯，你的程序有几个缺陷，应该改进以获得更好的性能。

1. switch之前不需要大括号，所以，删除switch语句之前的大括号{！

2. 同样，在 case 2 中不需要大括号 {，在 case-2 的 break 语句之前不需要大括号 }。你最好保持原样。

3. 删除之前的数据后，将这些代码行添加到您的case 5: 中。

   case 5:
      //  Scanner user_input = new Scanner( System.in );
   System.out.println("Enter the Rental Threshold: ");
   threshold = user_input.next();
   for(int i=0;i<array.length;i++){
   if(Integer.valueOf(threshold)>array[i])
   System.out.println("Month "+(i+1)+" has the rent falling below the threshold range as the rent is "+array[i]);
   }
   System.out.println("");
   break;
   

4. 最后，你只需要编辑do-while条件，设置为do{...}while(option>=1 && option<=5);

5. 另外，事实上，尽量适当地缩进你的代码，让它有更好的感觉！会让别人看懂你的代码，真心帮助你！

正确的工作代码：-

       import java.util.Scanner;
       public class jakeGrim {
       public static void main(String[] args) {
       int option;
       String squareFootage="";
       int noBed = 0;
       double totalSum =0;
       String propertyCode="";
       String propertyType="";
       String threshold="";
       Scanner input = new Scanner( System.in );
       Scanner user_input = new Scanner( System.in );
       double[] array = new double[12]; 
       do{
        // Display menu graphics
        System.out.println(" ");
        System.out.println("|  *****Rental Menu*******   |");
        System.out.println("|        1. Enter rental property Details     ");
        System.out.println("|        2. Enter monthly rent ( 12 Months )       ");
        System.out.println("|        3. Display Annual Rent");
        System.out.println("|        4. Display rental report       ");
        System.out.println("|        5. Display Monthly rents falling below a certain threshold       ");
        System.out.println(" ");
        System.out.println(" Please Select an option: ");
        option = input.nextInt();

          switch (option){
        case 1:
        System.out.println("Enter Rental Details: ");
        System.out.println("Property Code:            ");
        propertyCode = user_input.next();
        System.out.println("Property Type:            ");
        propertyType = user_input.next();
        System.out.println("Square Footage:           ");
        squareFootage = user_input.next();
        System.out.println("Number Of bedrooms        ");
        noBed = input.nextInt();
        break;

        case 2:

        Scanner keyboardScanner = new Scanner(System.in); 
        for (int i = 0; i < 12; i++) {
        System.out.println("Enter Rental for month[" +( i +1)+ "]");
        array[i] = keyboardScanner.nextDouble();
         }
       //So now, we need to do something with that array and sum up all the values in that array. 
        for (int i = 0; i < array.length; i++){
         System.out.println(array[i]);
        totalSum += array[i];
        }
        break;

        case 3:
        System.out.println("The annual rent for propery code "+propertyCode+" is:  " +totalSum);
        break;

        case 4:
        System.out.println(" Property Code:      "+propertyCode);
        System.out.println(" Property Type:      "+propertyType);
        System.out.println(" Square Footage:     "+squareFootage);
        System.out.println(" Number of Bedrooms: "+noBed);
        System.out.println("");
        System.out.println("");
        for(int i = 0; i<12; i++)
        System.out.println("Rental for month " + (i+1) + " : " + array[i]);
        break;

        case 5:
        //    Scanner user_input = new Scanner( System.in );
        System.out.println("Enter the Rental Threshold: ");
        threshold = user_input.next();
        for(int i=0;i<array.length;i++){
        if(Integer.valueOf(threshold)>array[i])
        System.out.println("Month "+(i+1)+" has the rent falling below the threshold range as the rent is "+array[i]);
        }
        System.out.println("");
        break;

        default:
        System.out.println("Invalid selection");
        break; 

       }
       } while (option>=1 && option<=5);
     }
    }