9도 OJ 1148: Financial Management(평균)

1141문항과 같다.
시간 제한: 1초
메모리 제한: 32메가
특수 판제:아니오
제출: 843
해결: 502
제목 설명:
    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.
입력:
    Each case 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.
출력:
    For each case, 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.
샘플 입력:

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

샘플 출력:

$1581.42

출처:
2010년 북경대학 컴퓨터 연구 생기 시험 진제
코드:

#include <stdio.h>
 
int main(void)
{
    int n, i;
    double cost;
    double sum;
 
    while (scanf("%lf", &cost) != EOF)
    {
        sum = cost;
        for(i=1; i<12; i++)
        {
            scanf("%lf", &cost);
            sum += cost;
        }
        printf("$%.2lf
", sum/12);
    }
 
    return 0;
}
/**************************************************************
    Problem: 1148
    User: liangrx06
    Language: C
    Result: Accepted
    Time:0 ms
    Memory:912 kb
****************************************************************/