Financial Managemen

题目7 20140306 20:04
Financial Management
时间限制：3000 ms | 内存限制：65535 KB
难度：1
描述
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.
样例输入
100.00
489.12
12454.12
1234.10
823.05
109.20
5.27
1542.25
839.18
83.99
1295.01
1.75
样例输出
1581.42*/

 1 #include<stdio.h>
 2   int main(){
 3        int n=12;
 4       double sum=0.00;
 5         while(n--){
 6              double a;
 7               scanf("%lf",&a);
 8                  sum=sum+a;
 9         }  printf("%g",sum/12);//  %g表示一%f %e中较短的输出宽度输出单双精度数 
10         return 0;
11   }
12   
13 
14  /* 
15   #include<stdio.h>
16   int main(){
17        int n=12;
18       double sum=0.00;
19         while(n--){
20              double a;
21               scanf("%lf",&a);
22                  sum=sum+a;
23         }  printf("%.2f",sum/12);
24         return 0;
25   }
26   */