class Main { public static void main(String[] args) { //实训内容:2 大数据2 9 郑林鸿 double a=1.1; double b=2.2; double c=3.3; double d=4.4; double e=5.5; double f=a+b+c+d+e; System.out.println("和="+f); System.out.println("平均数="+f/5); } }