import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); String a; a = in.nextLine(); for(int i=0, j=0;i<a.length();i++,j++) { if((i+1)%16==1) { String b = Integer.toHexString(i); //int k = b.length(); for(int k =0;k<8-b.length();k++) { System.out.print("0"); } System.out.print(b+" "); } System.out.print(Integer.toHexString(a.charAt(i))+" "); if(j==7){ System.out.print(" "); j = -1; } if(i%16==15) { System.out.print(a.substring(i - 15, i + 1)); if (a.length() - i >= 16) System.out.print("\n"); } } } } 考试的时候没做出来，现在回过头重新做了下，不知道对不对