HDOJ3_A+B for Input-Output Practice

Input
Input contains an integer N in the first line, and then N lines follow. Each line starts with a integer M, and then M integers follow in the same line.

Output
For each group of input integers you should output their sum in one line, and you must note that there is a blank line between outputs.
Sample Input

3
4 1 2 3 4
5 1 2 3 4 5
3 1 2 3

Sample Output

10

15

6
先分析一下这个题目：
题目要求先输入一个整数n，代表要输入n组数据
就例如 Sample Input里的3
然后每组数据第一个是m，代表这组数据的数的个数
就例如 Sample Input里的4,5,3
然后输入m个数

最后计算这m个数据的和并且打印出来
值得注意的是，行间需要隔开一行
而且最后一行不能多输出空行
下面是代码

import java.util.Scanner;public class Main {    private static Scanner scanner;    public static void main(String[] args) {        scanner = new Scanner(System.in);        int line = scanner.nextInt();        int vol = line;        int[] sum = new int[line];        int count = 0;        while(vol-->0){            int n = scanner.nextInt();            while(n-->0){                int i = scanner.nextInt();                sum[count] += i;            }            count++;        }        for (int i = 0;i < line;i++) {            System.out.println(sum[i]);            if(i+1 < line){                System.out.println();            }        }    }}