编辑代码

class Main {
	public static void main(String[] args) {
      long sum=0,fact;
      for(int n=1;n<=7;n++){
         fact =1;
         for(int m=1;m<=n;m++)
         fact*=m;
         sum+=fact;
      }
      System.out.println("sum="+sum);
       System.out.println("25 曾骞");
}
}