// This program uses the == operator to compare the string entered
// by the user with the valid stereo part numbers.
#include <iostream>
#include <iomanip>
#include <string>
using namespace std;

int main()
{
   const double APRICE = 249.0;   // Price for part A
   const double BPRICE = 299.0;   // Price for part B
   string partNum;                // Part mumber

   cout << "The stereo part numbers are:\n";
   cout << "\tBoom Box, part number S147-29A\n";
   cout << "\tShelf Model, part number S147-29B\n";
   cout << "Enter the part number of the stereo you\n";
   cout << "wish to purchase: ";
   cin >> partNum;
   cout << fixed << showpoint << setprecision(2);

   if (partNum == "S147-29A")
      cout << "The price is $" << APRICE << endl;
   else if (partNum == "S147-29B")
      cout << "The price is $" << BPRICE << endl;
   else
      cout << partNum << " is not a valid part number.\n";
   return 0;
}