import java.util.Scanner;
public class Test {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("输入一串字符: ");
String str = sc.nextLine();
char[] cr = str.toCharArray();
for(int i = 0; i < cr.length; i++){
if(cr[i] <= 'z' && cr[i] >= 'a'){
cr[i] = Character.toUpperCase(cr[i]);
}else{
cr[i] = Character.toLowerCase(cr[i]);
}
}
System.out.println("冒泡排序(从大到小): ");
for (int k = 0; k < cr.length - 1; k++) {
for (int j = k + 1; j < cr.length; j++) { // 升序把<改成>
if (cr[k] < cr[j]) {
char temp = cr[k];
cr[k] = cr[j];
cr[j] = temp;
}
}
}
for(int i = 0; i < cr.length; i++){
System.out.print(cr[i] + "\t");
}
}
}