练习的第一部分是计算考试成绩的平均值。下一个问题要求我解决这个问题并计算最小值和最大值。谁能帮我？到目前为止，这是我的代码。
import java.util.Scanner;
import java.io.*;
import java.text.DecimalFormat;
public class hw
{
public static void main ( String[] args )
{
int maxGrade;
int minGrade;
int count=0;
int total=0;
final int SENTINEL = -1;
int score;
Scanner scan = new Scanner( System.in);
System.out.println( "To calculate the class average, enter each test
score.");
System.out.println( "When you are finished, enter a -1.");
System.out.print( "Enter the first test score > ");
score = scan.nextInt();
while (score != SENTINEL )
{
total += score;
count ++;
System.out.print("Enter the next test score > ");
score = scan.nextInt();
}
if (count != 0)
{
DecimalFormat oneDecimalPlace = new DecimalFormat("0.0");
System.out.println( "\nThe class average is "
+ oneDecimalPlace.format( (double) (total) / count ));
}
else
System.out.println("\nNo grades were entered");
}
}
在while循环中，您可以将当前分数与最大和最小进行比较。
while (score != SENTINEL )
{
total += score;
count ++;
if(score > maxGrade)
maxGrade = score;
if(score < minGrade)
minGrade = score;
System.out.print("Enter the next test score > ");
score = scan.nextInt();
}
您还需要将最大值和最小值（在声明它们时）设置为它们的“相反”值：
int maxGrade = Integer.MIN_VALUE;
int minGrade = Integer.MAX_VALUE;
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