public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
float a, b;
System.out.println("请输入俩个实数:");
a = sc.nextFloat();
b = sc.nextFloat();
if (a > b) {
System.out.printf("%7.2f,%7.2f", a, b);
} else {
System.out.printf("%7.2f,%7.2f", b, a);
}
}