求素数和

求第m个到第n个素数之间的素数和

import java.util.Scanner;
public class All {
   public static void main(String[] args) {
      int a[] = new int[200];
      int index = 0;
      for (int i = 1; i < 200; i++) {
         boolean isPrime = true;
         for (int k = 2; k < i; k++) {
            if (i % k == 0) {
               isPrime = false;
               break;
            }
         }
         if (isPrime) {
            a[index++] = i;
            System.out.println(a[index - 1]);
         }
      }
      Scanner small = new Scanner(System.in);
      Scanner large = new Scanner(System.in);
      int m = small.nextInt();
      int n = large.nextInt();
      int sums = 0;
      int suml = 0;
      int sum = 0;
      for (int i = 0; i < m; i++) {
         sums += a[i];
         System.out.print(a[i] + "*");
      }
      for (int i = 0; i < n; i++) {
         suml += a[i];
         System.out.print(a[i] + " ");
      }
      sum = suml - sums;
      System.out.println(sum);
   }
}