Question

C++

If necessary, create a new project named Introductory20 Project and save it in the Cpp8\Chap13 folder. Also create a new source file named Introductory20.cpp. Write a program that displays the appropriate shipping charge based on the region code entered by the user. To be valid, the region code must contain exactly three characters: a letter (either A or B) followed by two numbers. The shipping charge for region A is $25. The shipping charge for region B is $30. Display an appropriate message if the region code is invalid. Use a sentinel value to end the program. Save and then run the program. Test the program using the following region codes: A11, B34, C7, D2A, A3N, C45, and 74TV.

Answer 1

Hi. Below is the code that i had compiled in visual studio for C++.

***************************************************************************

#include "stdafx.h"
#include <iostream>
using namespace std;

int main()
{
   char code[10];
   char ch;
   int length;
   int flag;
   do
   {
       cout << "\nenter the region code :";
       cin >> code;
       length = 0;
       flag = 0;

       if (code[0] != 'A' && code[0] != 'B')
       {
           flag = 1;
       }

       for (int i = 0; code[i] != '\0'; i++)
       {
           length++;
           if (length > 3)
           {
               flag = 1;
               break;
           }
           int ascii = code[i];
           if (i > 0 && !(ascii >= 48 && ascii <= 57)) //ascii value of digits 0-9 is 48 to 57
           {
               flag = 1;
               break;
           }
       }
       if (length < 3)
       {
           flag = 1;
       }
      

       if (flag == 0)
       {
           int charge = (code[0] == 'A') ? 25 : 30;
           cout << "\n\nThe shipping charge is : $" << charge;
       }
       else
       {
           cout << "\nInvalid region code!!!";
       }
       cout << "\n\twant to enter more (y/n)?";
       cin >> ch;
   } while (ch != 'n');

   return 0;
}

********************************************************************

output :

feel free to ask if you have any doubt :)