poj: 1004

 1  #include <iostream>
 2  #include <stdio.h>
 3  #include <string.h>
 4  #include <stack>
 5  using namespace std;
 6 
 7  int main()
 8  {
 9      double salary[12];
10      double sum = 0;
11      for (int i = 0; i < 12; ++i) {
12         cin >> salary[i];
13         sum += salary[i];
14      }
15      cout << "$" << sum/12 << endl;
16      return 0;
17  }