问如何在用户每次输入数据时递增一个变量？

EN

// variables
int num, count = 0, high, low;
Scanner userInput = new Scanner(System.in);

// loop
do {
   System.out.print("Enter an integer, or -99 to quit: --> ");
   num = userInput.nextInt();

   count++; // here it goes

   high = num;
   low = num;

   // higher or lower
   if(count > 0 && num > high)
   {
      high = num; 
   }
   else if(count > 0 && num < low)
   {
      low = num;
   }
   else
   {
       System.out.println("You did not enter any numbers."); 
   }

} while (num != -99);

System.out.println("Largest integer entered: " + high);
System.out.println("Smallest integer entered: " + low);

Scanner userInput = new Scanner(System.in);
String ls = System.lineSeparator();

int high = 0;
int low = Integer.MAX_VALUE;
int num;
String input = "";
while(input.equals("")) {
    System.out.print("Enter an integer, (q to quit): --> ");
    input = userInput.nextLine().toLowerCase();
    if (input.equals("q")) {
        if (low == Integer.MAX_VALUE) {
            low = 0;
        }
        break;
    }
    if (!input.matches("^-?\\d+$")) {
        System.err.println("Invalid Entry (" + input + ")! "
                         + "You must supply an Integer (int) value!" + ls);
        input = "";
        continue;
    }

    boolean invalidInteger = false;
    long tmpVal=0;
    try {
        tmpVal = Long.parseLong(input);
    } catch(NumberFormatException ex) {
        invalidInteger = true;
    }
    if (invalidInteger || tmpVal < Integer.MIN_VALUE || tmpVal > Integer.MAX_VALUE) {
        System.err.println("Invalid Entry (" + input + ")! " + ls
                         + "Number too large (Minimum Allowable: " + Integer.MIN_VALUE 
                         + "  Maximum Allowable: " + Integer.MAX_VALUE + ")!" + ls
                         + "You must supply an Integer (int) value!" + ls);
        input = "";
        continue;
    }
    num = Integer.parseInt(input);
    if (num > high) {
        high = num;
    }
    if (num < low) {
        low = num;
    }
    input = "";
}
System.out.println("Largest integer entered:  " + high);
System.out.println("Smallest integer entered: " + low);