HDU 1064 Financial Management

 1 #include <iostream>
 2 #include <cstdio>
 3 using namespace std;
 4 
 5 
 6 int main()
 7 {
 8     double a=0;
 9     double sum=0;
10     //freopen("C:\\CODE\\in.txt", "r", stdin);
11 
12     for(int i=0;i<12;i++){
13             scanf("%lf", &a);
14         sum+=a;
15         //printf(" sum  =  %lf\n",sum);
16     }
17  printf("$%.2lf\n",sum/12);
18     return 0;
19 }