Java基础50题test8—输入数字求和

 1 import java.util.*;
 2 
 3 public class Test8{
 4 
 5     public static void main(String[] args) {
 6         System.out.println("请输入数字（0~9）：");
 7         Scanner in = new Scanner(System.in);
 8         int a = in.nextInt();
 9         System.out.println("请输入项数：");
10         Scanner xin= new Scanner(System.in);
11         int n = xin.nextInt();
12         in.close();
13         xin.close();
14         int sum =Sum(a,n);
15         System.out.println("和为："+sum);
16     }
17 
18     private static int Sum(int i, int j) {
19         int temp = 0;
20         int s = 0;
21         for(int k=0;k<j;k++)
22         {
23             temp = temp*10+i;
24             s=s+temp;
25             
26         }
27         return s;
28     }
29 
30 }