TSHIRT Program

#include <iostream>
#include <cstdlib>

    /*
      Programmer: Bryan Virgil
      Date:       10 04 2017
      Description:    Tshirt company is giving the following discounts
                        1..5   --> 0% discounts
                        6..10  --> 10% discounts
                        10+    --> 25% discounts*/

using namespace std;

int main()
{

    int numTShirts;
    cout << "How many T-Shirts did you purchase:";
    cin >> numTShirts;
    if (cin.fail())
    {
        cout << "Wrong data type, please run the program" << endl;
    }
    else
    {
        if (numTShirts < 1)
        {
            cout << "Invalid quantity, please run the program again" << endl;
            cout << "Exiting..." << endl;
            exit(EXIT_FAILURE);
        }
        // get rid of the exit and implement the else part
       // else
       switch(numTShirts)
       {
       case 1:
       case 2:
       case 3:
       case 4:
       case 5:
            cout << "You get 0% discount" << endl;
           break;
       case 6:
       case 7:
       case 8:
       case 9:
       case 10:
           cout << "You get 10% discount" << endl;
            break;
           default: cout << "You get 25% discount" << endl;
       }
    }
    return 0;
}