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

int main()
{
   // Price of parts.
   const double A_PRICE = 249.0,
                B_PRICE = 299.0;

   // Character array for part number.
   const int PART_LENGTH = 8;
   char partNum[PART_LENGTH];

   // Instruct the user to enter a part number.
   cout << "The stereo part numbers are:\n"
        << "\tBoom Box, part number S147-29A\n"
        << "\tShelf Model, part number S147-29B\n"
        << "Enter the part number of the stereo you\n"
        << "wish to purchase: ";

   // Read a part number of at most 8 characters.
   cin >> partNum;

   // Determine what user entered using strcmp
   // and print its price.
   cout << showpoint << fixed << setprecision(2);
   if (strcmp(partNum, "S147-29A") == 0)
      cout << "The price is $" << A_PRICE << endl;
   else if (strcmp(partNum, "S147-29B") == 0)
      cout << "The price is $" << B_PRICE << endl;
   else
      cout << partNum << " is not a valid part number.\n";
   return 0;
}