萌新求助 洛谷B2054 Java代码

萌新求助 洛谷B2054的Java代码

public static void main(String[] args) {
  
  Scanner sc = new Scanner(System.in);
  DecimalFormat df = new DecimalFormat("0.00");
  
  int x = sc.nextInt();
  String a = null ;
  int sum = 0;
  int y ;
  
  for (int i = 0; i <= x; i++) {
   a = sc.nextLine();
  }
  
   String arr[] = a.split("nextLine"); 
   int num[] = new int[arr.length];
   
   for (int i = 0; i < num.length; i++) {
    num[i] = Integer.parseInt(arr[i]);
    
    for (int j = 0; j < num.length; j++) {
     sum = sum + num[j];
     
    }
    System.out.println(df.format(sum/x));
  } 
   
 }

结果无法相加

a.split("nextLine") 你是要分隔什么呢？

public static void main(String[] args) {
              Scanner sc = new Scanner(System.in);
              DecimalFormat df = new DecimalFormat("0.00");
              int x = sc.nextInt();
              int sum = 0;
              int num[] = new int[x];
              for (int i = 0; i < x; i++) {
                  num[i] = sc.nextInt();
                  sum = sum + num[i];
              }
              
                System.out.println(df.format(sum*1.0/x));
              
             }