Payrolls R' Us (School Project)

#include <iostream>
#include <string>
using namespace std;

int main()
{
    string name, ss;
    int bsal, location, customers;
    double ttlsales, comrate, gpay, com;
    char response;
    customers = 0;
    cout << "Enter SS Number: ";
    cin >> ss;
    cout << "Enter full name: ";
    cin.ignore();
    getline(cin, name);
    cout << "Enter base salary: ";
    cin >> bsal;
    cout << "Enter total sales: ";
    cin >> ttlsales;

    //Checks to see what the user's base salary is in order to create a commision rate.

    switch(bsal){
        case 5000:
            comrate = .05;
            break;
        case 3500:
            comrate = .08;
            break;
        case 2000:
            comrate = .1;
            break;
        default:
            comrate = .04;
            break;
    }
    com = ttlsales * comrate;
    gpay = bsal + com;
    system("cls");
    cout << "Gross Pay Summary for: " << name.substr(0, 1) << ".";
    location = name.find(" ");
    cout << name.substr(location, name.length() - location) << ", XXX-XX-" << ss.substr(5, 9) << "\n" << endl;
    cout << "Base Salary: $" << bsal << ".00"<< endl;
    cout << "Total Sales: $" << ttlsales << ".00" << endl;
    cout << "Gross Pay: $" << gpay << ".00\n" << endl;
    customers = customers ++;
    cout << "Would you like to compute another user?(y/n)" << endl;
    cin >> response;

    //Loops the program until the user answers no.

    do{
        system("cls");
            cout << "Enter SS Number: ";
    cin >> ss;
    cout << "Enter full name: ";
    cin.ignore();
    getline(cin, name);
    cout << "Enter base salary: ";
    cin >> bsal;
    cout << "Enter total sales: ";
    cin >> ttlsales;

    switch(bsal){
        case 5000:
            comrate = .05;
            break;
        case 3500:
            comrate = .08;
            break;
        case 2000:
            comrate = .1;
            break;
        default:
            comrate = .04;
            break;
    }
    com = ttlsales * comrate;
    gpay = bsal + com;
    system("cls");
    cout << "Gross Pay Summary for: " << name.substr(0, 1) << ".";
    location = name.find(" ");
    cout << name.substr(location, name.length() - location) << ", XXX-XX-" << ss.substr(5, 9) << "\n" << endl;
    cout << "Base Salary: $" << bsal << ".00"<< endl;
    cout << "Total Sales: $" << ttlsales << ".00" << endl;
    cout << "Gross Pay: $" << gpay << ".00\n" << endl;
    customers = customers ++;
    cout << "Would you like to compute another user?(y/n)" << endl;
    cin >> response;
    }while(response == 'y');

    cout << "\nYou have processed " << customers <<  " customers today." << endl;
    cout << "Thank you for using Payrolls R' Us! Have a good day!" << endl;
    int x;
    cin>>x;
    return(0);
}