总结:对象调用方法,与在main 里直接输出没什么大的区别,少用方法,
乱搞++++
package com.c2; import java.util.Scanner; public class DD { // 求数组的平均值即 :a[i]/a.length public static void main(String[] args) { Scanner c = new Scanner(System.in); int a[] = new int[4]; DD b = new DD(); // DD d=new DD(); /* * System.out.println("请输入10个数-----"); int b=c.nextInt(); int * b1=c.nextInt(); int b2=c.nextInt(); int b3=c.nextInt(); int * b4=c.nextInt(); */// 很sb啊。这么手打出来会累,会繁琐,不如用循环.比如放入10000个数,我难道要写10000行、?? double s = 0; for (int i = 0; i < a.length; i++) { System.out.println("请输入第" + (i + 1) + "个数---"); a[i] = c.nextInt(); s += a[i]; // System.out.println(""+s); } System.out.println("平均值为:" + s / a.length); System.out.println("总和为:" + s); } }