//*****************************************
// An accouting system that keep track of  
// the expense totals for each employee
// at the end of the month.
//
//
//
// Written By: Paula S. Woodson
// Due Date Friday  Dec. 5, 2008
//
//******************************************                                                                                                                                                                                                                                                                  
                                                                                                                                 
#include <iostream> 
#include <iomanip> 
using namespace std;

const int MAXEMPLOYEES = 30;


// sets the contents of both arrays to zero

void InitializeArrays(float expenses[],
                      int expensecounts[],
                      int numemployees)
{
  for (int i = 0; i < numemployees; i++)
  {
    expensecounts[i] = 0; //initialize the expense counts
    expenses[i] = 0;      //intiialize the expenses
  }
}

// inputs the "expense slips" from the data file and tallies them into the 
//                               arrays

void TallyExpenses(float expenses[],
                      int expensecounts[],
                      int numemployees)
{
  float
  anexpense; // one expense

  int
  employeeid; // employee id number

  cin >> employeeid;
  while(employeeid != -1)
  {
   cin >> anexpense;
   expensecounts[employeeid] ++;
   expenses[employeeid] += anexpense;
   cin >> employeeid;
  } 
}


// uses the arrays from tallyexpenses to producr an expense summary report

void ReportExpenses(float expenses[],
                      int expensecounts[],
                      int numemployees)

{
  
  float
  average,             // average
  totalexpense = 0,   // total expense
  minexpense = 1e29;    // min expenses
  
  int 
  totalnumexpense = 0,  // total number expense
  minid;                // min id number

  cout<< "                           Expense Summary Report";
  cout<< "      ";
  cout<< "\n   Employee Id " <<"   " << " # of expenses " <<"   " << setw(10);
  cout<< " Expense Total " <<"       "  << " Average Expense\n";
  
  for(int i = 0; i < numemployees; i++)
   {
   cout << setw(8) << i;  
   cout <<"      " << setw(8) << expensecounts[i];
   cout << fixed << setprecision(2);  
   cout << "                $" << setw(8) <<  expenses[i];
   cout << fixed << setprecision(2);  
   average = (expenses[i]/expensecounts[i]);
   cout << "                $";
   cout << setw(7);
   cout <<  average;
   cout << "\n\n";
   totalnumexpense += expensecounts[i];
   totalexpense += expenses[i];
   if (expenses[i] < minexpense)
      {
        minexpense = expenses[i];
        minid = i;
      }
   }

 cout << "      Totals";
 cout << setw(10) << totalnumexpense; 
 cout << setw(10)<<"                   " << totalexpense;
 cout << "\n\n";
 cout << "Congratulations to employee number " << minid <<" who had the lowest total"; 
 cout << " expense amount";
 cout << "\n";
}


int main ()
{
 float 
 expenses[MAXEMPLOYEES];        // expense array
 
 int
 expensecounts[MAXEMPLOYEES],   // expense counts arrays
 numemployees;                  // number of employees

cin >> numemployees;


// calls the functions from above

 InitializeArrays(expenses, expensecounts, numemployees);

 TallyExpenses(expenses, expensecounts, numemployees);

 ReportExpenses(expenses, expensecounts, numemployees);
}