poj 1004 Financial Management

Financial Management

Time Limit: 1000MS		Memory Limit: 10000K
Total Submissions: 183485		Accepted: 69389

DescriptionLarry 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'sbeen 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.InputThe 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.OutputThe 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 charactersin 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

题目大意：

求平均值，很简单的一道题，就不解释了，直接看代码，但是要注意保留两位小数哟

代码：

#include<stdio.h>int main(){double a,sum=0.0,ave,i;for(i=0;i<12;i++){scanf("%lf",&a);sum+=a;}ave=sum/12.0;printf("$%.2f",ave);return 0;}