JAVA hdu 2004(成绩转换)&&hdu 2020(绝对值排序)

import java.util.Scanner;

public class Main {
public static void main(String[] args) {
int a;
Scanner inScanner = new Scanner(System.in);
while (inScanner.hasNextInt()) {
a = inScanner.nextInt();
if (a >= 90 && a <= 100)
System.out.println("A");
else if (a < 90 && a >= 80)
System.out.println("B");
else if (a < 80 && a >= 70)
System.out.println("C");
else if (a < 70 && a >= 60)
System.out.println("D");
else if (a < 60 && a >= 0)
System.out.println("E");
else
System.out.println("Score is error!");
}
}
}

import java.util.Scanner;

public class Main {
public static void main(String[] args) {
int[] a = new int[105];
int n;
Scanner inScanner = new Scanner(System.in);
while (inScanner.hasNextInt()) {
n = inScanner.nextInt();
if (n == 0)
break;
for (int i = 0; i < n; i++)
a[i] = inScanner.nextInt();
for (int i = n - 1; i >= 0; i--) {
for (int j = 0; j < i; j++) {
int temp;
if (Math.abs(a[j]) < Math.abs(a[j + 1])) {
temp = a[j];
a[j] = a[j + 1];
a[j + 1] = temp;
}
}
}
for (int i = 0; i < n - 1; i++)
System.out.print(a[i] + " ");
System.out.println(a[n - 1]);
}
}
}