【1004】Financial Management （POJ）（水题——求平均值）

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本文介绍了一个在线编程问题，要求通过计算过去十二个月的银行账户余额来得出平均余额，同时提供了解决方案并解释了实现过程。

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Financial Management

Time Limit: 1000MS		Memory Limit: 10000K
Total Submissions: 134719		Accepted: 57403

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

Sample Output

$1581.42

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <iostream>
using namespace std;
int main()
{
    double a[12];
    int i;
    double ave=0;
    for(i=0; i<12; i++)

    {
        cin>>a[i];
        ave+=a[i];
    }
    ave/=12;
    cout<<"$"<<ave<<endl;
    return 0;
}

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