public class Test2018_5 { public static String tenToThree(int n){ StringBuilder sb=new StringBuilder(); while(n/3!=0){ sb.append(n%3); n=n/3; } sb.append(n); return sb.reverse().toString(); } public static void main(String[] args){ int a=4; int b=680; int c=2599; System.out.println("4转换的结果为:"+tenToThree(a)); System.out.println("680转换的结果为:"+tenToThree(b)); System.out.println("2599转换的结果为:"+tenToThree(c)); } }