4.7 Java笔记

public class ff {
    public static void main(String[] args) {
        int[] nums = {1,2,3,4,5};
        ff dm = new ff();
        System.out.println("数组的总和为:" + dm.sum(nums));
        dm.avg(nums);
    }
    public int sum(int[] nums) {
        int sum = 0;
        for(int i = 0; i < nums.length; i++) {
        sum += nums[i];
        }
    return sum;
    }
    public void avg(int[] nums) {
        int sum = sum(nums);
        System.out.println("数组平均值为:" + (double)(sum / nums.length));
    }
}