錯誤提示查找符號（用於循環）

Question

每當我運行此程序時，它說它找不到SHOTS的符號（最后一行），所以我認為問題是因為我在FOR LOOP中聲明了SHOTS，但是當我想將其打印出來時，我不能..

import java.util.Scanner;

public class CoffeeBot {
    public static void main(String[] args) {
        Scanner keyboard = new Scanner(System.in);
        System.out.println ("Hello, what's your name?");
        String name = keyboard.nextLine();
        System.out.println("Would you like to order some coffee, " + name + "? (y/n)");
        String goon=keyboard.next();
        char answer=goon.charAt(0);
        if ((answer!= 'y') && (answer!='n'))
            System.out.println("no valid");
        else if (answer== 'n')
            System.out.println("OK BYE");
        else {
            System.out.println("Great, Let's get started.");
            System.out.println("Order selection");
            System.out.println("----------------");
            System.out.println("There are 90 coffee cups in stock and each costs $2.00");
            System.out.println("There are 100 coffee shots in stock and each costs $1.00");
            System.out.println("How many cups of coffee would you like?");
            int CupsOfCoffee = keyboard.nextInt();
            if (CupsOfCoffee ==0)
                System.out.println("No cups, no coffee, Goodbye");
            else if (CupsOfCoffee < 0)
                System.out.println("Doesn't compute, system terminating");
            else if (CupsOfCoffee >90)
                 System.out.println("Not enogh stock,come back later");
            else {
                int countd;
                for (countd = 1; countd<= CupsOfCoffee; countd++) {
                    System.out.println("How many coffee shots in cup "+ countd);
                     int shots = keyboard.nextInt();
                }
                System.out.println("Order Suammery\n----------------");
                for (countd = 1; countd<= CupsOfCoffee; countd++)
                    System.out.println("cup " + countd + "has" + shots+  "and will cost" ) ;
            }
        }
    }
}

然后我嘗試進行一些更改，方法是在FOR LOOP之外聲明SHOTS，然后通過將輸出（SHOTS）作為我輸入的最后一個數字，得出了這個結論：例如，當我問多少張照片時，我說2 ，3,4，..所有的杯子（1,2和3）得到4張照片，我要為cup1得到2張照片，為杯子2獲得3張照片，為杯子3獲得4張照片。

 import java.util.Scanner;
 public class CoffeeBot
{
 public static void main(String[] args)
 {

Scanner keyboard = new Scanner(System.in);
System.out.println ("Hello, what's your name?");
String name = keyboard.nextLine();
System.out.println("Would you like to order some coffee, " + name + "? (y/n)");
 String goon=keyboard.next();
 char answer=goon.charAt(0);  
 if ((answer!= 'y') && (answer!='n'))
 System.out.println("no valid");
 else if (answer== 'n')
 System.out.println("OK BYE");
else{
System.out.println("Great, Let's get started.");
 System.out.println("Order selection");
 System.out.println("----------------");
  System.out.println("There are 90 coffee cups in stock and each costs $2.00");
  System.out.println("There are 100 coffee shots in stock and each costs $1.00");
   System.out.println("How many cups of coffee would you like?");
   int CupsOfCoffee = keyboard.nextInt();
   if (CupsOfCoffee ==0)
   System.out.println("No cups, no coffee, Goodbye");
  else if (CupsOfCoffee < 0)
  System.out.println("Doesn't compute, system terminating");
  else if (CupsOfCoffee >90)
     System.out.println("Not enogh stock,come back later");
    else {


   int countd;
   int shots=0;
     for (countd = 1; countd<= CupsOfCoffee; countd++)
   {
      System.out.println("How many coffee shots in cup "+ countd);

     shots = keyboard.nextInt();
    }
   System.out.println("Order Suammery\n----------------");
    for (countd = 1; countd<= CupsOfCoffee; countd++)

   System.out.println("cup " + countd + "has" + shots+  "and will cost" ) ;

   }
   }
   }
   }

我認為我應該將SHOTS值存儲在int []數組中。

Answer 1

我可以看到幾個問題。 首先，在最后一行的println語句中，您指的是shot而不是shots 。

其次，在for循環外聲明shots是可以的，但是您需要在循環內重新定義它，隱藏另一個變量。

要使用數組，請嘗試以下操作：

...
int[] shots = new int[CupsOfCoffee];
for (countd = 0; countd < CupsOfCoffee; countd++)
{
    System.out.println("How many coffee shots in cup " + (countd + 1));

    shots[countd] = keyboard.nextInt();
}
System.out.println("Order Suammery\n----------------");
for (countd = 0; countd < CupsOfCoffee; countd++)

System.out.println("cup " + (countd + 1) + " has " + shots[countd] +  " shots and will cost" ) ;

請注意，數組索引從零開始，因此我更新了countd以反映這一點。

作為一般樣式，變量通常應以小寫字母開頭，因此理想情況下應使用cupsOfCoffee 。

Answer 2

您需要使用一個數組，以便每個杯子的命中計數。

int countd;
int[] shots = new int[CupsOfCoffee];
for (countd = 1; countd <= CupsOfCoffee; ++countd) {
    System.out.println("How many coffee shots in cup "+ countd);
    shots[countd - 1] = keyboard.nextInt();
}

for (countd = 1; countd <= CupsOfCoffee; ++countd) {
    System.out.println("cup " + countd + "has" + shots[countd - 1]+  "and will cost");
}