No.1004：Financial Management

Financial Management
Time Limit:1000MS  Memory Limit:10000K
Total Submit:18483 Accepted:8482

Description
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.

Input
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.

Output
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.

Sample Input

100.00
489.12
12454.12
1234.10
823.05
109.20
5.27
1542.25
839.18
83.99
1295.01
1.75

 

Sample Output

$1581.42

Java实现代码：

/**//*
 * Main.java
 *
 * Created on 2006年9月16日, 上午1:48
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

/** *//**
 *
 * @author jailu
 */
import java.util.*;
public class Main {
    
    public static void main(String[] args) {
        Scanner cin = new Scanner(System.in);
        double dbResult = 0;
        
        for (int i = 0;i < 12;i ++)
        {
            dbResult += Double.parseDouble(cin.next());
        }
        dbResult /= 12;
        dbResult = Math.round(dbResult * 100);
        dbResult = dbResult / 100;
        System.out.println("$" + dbResult);
    }
}

评定结果：

Run ID	User	Problem	Result	Memory	Time	Language	Code Length	Submit Time
1588401	jailu	1004	Accepted	1276K	156MS	Java	0.45K	2006-09-16 02:13:06.0