添加一个变量，每次运行循环时都应该更新Java

Question

我需要帮助，了解如何向我的代码中添加一个变量，以输出报告中接受调查的人数。使用一个名为personCount的新变量来做到这一点，每次运行循环时都应该更新它。

我试过这种方式，但在开始循环写

int count=0; 

之前和内环路写

count++; 

此计数变数将存放它不工作

class morecoffee 
{ 
    public static void main (String [] args) 
    { 
     Scanner input = new Scanner(System.in); 

     int person, preference, nothing, sugar, sweetener, count, quit, personcount; 

     nothing = sugar = sweetener = 0; 
     int personcount=0;  
     for (;;) 
    { 

     System.out.println ("How do you sweeten your coffee?"); 
     System.out.println ("1. I don't"); 
     System.out.println ("2. With sugar?"); 
     System.out.println ("3. With sweetener?"); 
     System.out.println ("4. Quit"); 
     System.out.println (personcount + " people took the survey "); 

     personcount++; 
     preference = input.nextInt(); 


     if (preference == 1) 
       nothing++; 

      else if (preference == 2) 
        sugar++; 
      else if (preference == 3) 
       sweetener++; 

    if (preference == 4) 
     break; 
    } 
     System.out.println ("Survey Report"); 
     System.out.println ("============="); 

     System.out.println (nothing + " person don't sweeten coffee"); 
     System.out.println (sugar + " person use sugar in coffee"); 
     System.out.println (sweetener + " person use sweetener in coffee"); 
    } 
} 

Answer 1

所需值。在回路后打印

System.out.println(count);