华为机试：字符个数统计

 1 import java.util.Scanner;
 2 
 3 public class Main {
 4 
 5     public static void main(String[] args) {
 6         Scanner sc=new Scanner(System.in);
 7         while(sc.hasNext()){
 8             String s = sc.nextLine();
 9             int[] state = new int[128];
10             for(int i = 0;i < s.length();i++){
11                 int temp_num = s.charAt(i);
12                 state[temp_num] = 1;
13             }
14             int count = 0;
15             for(int i = 0;i<state.length;i++){
16                 count+=state[i];
17             }
18             System.out.println(count);
19         }
20         sc.close();
21     }
22 }