java解法,简单易懂
import java.util.*; public class Main{ public static void main(String[] args){ Scanner sc = new Scanner(System.in); while(sc.hasNext()){ String s1 = sc.next(); String s2 = sc.next(); int n = 0; for(int i=0; i<s1.length(); i++){ if(s2.contains(s1.substring(i,i+1))){ n++; } } if(n==s1.length()) System.out.println(true); else System.out.println(false); } } }