资金统计

个人信息：就读于燕大本科软件project专业 眼下大三;

本人博客：google搜索“cqs_2012”就可以;

个人爱好：酷爱数据结构和算法。希望将来从事算法工作为人民作出自己的贡献;

编程语言：C++ 和 Java ;

编程坏境：Windows 7 专业版 x64;

编程工具：vs2008;

制图工具：office 2010 powerpoint;

硬件信息：7G-3 笔记本;

真言

经验是少不了尝试的

题目

白练：1004

描写叙述

Larry graduated this year and finally has a job. He‘s making a lot of money, but somehow never seems to have enough. Larry has decided that he needs to grab hold of his financial portfolio and solve his financing problems. The first step is to figure out
what‘s been going on with his money. Larry has his bank account statements and wants to see how much money he has. Help Larry by writing a program to take his closing balance from each of the past twelve months and calculate his average account balance.

输入

The input will be twelve lines. Each line will contain the closing balance of his bank account for a particular month. Each number will be positive and displayed to the penny. No dollar sign will be included.

输出

The output will be a single number, the average (mean) of the closing balances for the twelve months. It will be rounded to the nearest penny, preceded immediately by a dollar sign, and followed by the end-of-line. There will be no other spaces or characters
in the output.

代码（JAVA）

import java.io.*;
import java.text.DecimalFormat;
import java.util.*;

public class Main
{
	public static void main(String args[]) throws Exception
	{
		Scanner cin = new Scanner(System.in);
		double[] mydata = new double[12];
		int i = 0;
		while(i < 12)
		{
			mydata[i] = cin.nextDouble();
			i++;
		}
		my_1004(mydata);
	}

	public static void my_1004(double[] myarray)
	{
		int i = 0 ;
		double result = 0 ;
		while(i < myarray.length)
		{
			result = result + myarray[i] ;
			i++;
		}
		result = result / myarray.length ;
		DecimalFormat df = new DecimalFormat("#.00");
		System.out.println("$"+df.format(result));
	}
}

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