#include <iostream>
#include <fstream>
#include <cstring>
#include <iomanip>
#include <cstdlib>
#include <cctype>
 
 
using namespace std;
 
const int MAX_ACCOUNTS = 20;
 
class Customer
{
      public:
             void setCustomer(string,string,string,string,string,string);
             bool checkCustomerData(string, string, string);
             void displayTypes(Customer*) const;
      private:
              string custId, firstName, lastName, address, phoneNum, custType;
              static int normCount,silCount,goldCount,platCount;
 
};
 
 
int Customer::normCount = 0;
int Customer::silCount = 0;
int Customer::goldCount = 0;
int Customer::platCount = 0;
 
 
void Customer::setCustomer(string id, string fname, string lname, string add, string pnum, string type)
{
     custId = id;
     firstName = fname;
     lastName = lname;
     address = add;
     phoneNum = pnum;
 
     //convert to lower case
     for(int i = 0; i < type.size() - 1; i++)
     {
         custType[i] = tolower(type[i]);
     }
 
}
 
 
bool Customer::checkCustomerData(string id, string pnum, string type)
{
     bool validity = true;
     string normal = "normal";
     string silver = "silver";
     string gold = "gold";
     string plat = "platinum";    
 
 
     if(id.size() != 5 || pnum.size() != 8)//check number of digits
        validity = false;
 
     for(int i = 0; i < id.size() - 1; i++)//check if all are digits
     {
         if(!isdigit(id[i]))
            validity = false;
     }
 
     for(int i = 0; i < pnum.size() - 1; i++)
     {
         if(!isdigit(pnum[i]))
            validity = false;             
     }
 
     //check if normal gold silver or platinum
     if(strcmp(type.c_str(), normal.c_str()) != 0)
        validity = false;
        else if(strcmp(type.c_str(), silver.c_str()) != 0)
                validity = false;
        else if(strcmp(type.c_str(), gold.c_str()) != 0)
                validity = false;
        else if(strcmp(type.c_str(), plat.c_str()) != 0)
                validity = false;
 
 
     return validity;
 
}
 
 
void Customer::displayTypes(Customer* c) const
{
     string normal = "normal";
     string silver = "silver";
     string gold = "gold";
     string plat = "platinum";  
 
     for(int i = 0; i < MAX_ACCOUNTS; i++)
     {
       if(int a = strcmp(c[i].custType.c_str(), normal.c_str()) == 0)
          normCount++;
        else if(int a = strcmp(c[i].custType.c_str(), silver.c_str()) == 0)
                silCount++;
        else if(int a = strcmp(c[i].custType.c_str(), gold.c_str()) == 0)
                goldCount++;
        else if(int a = strcmp(c[i].custType.c_str(), plat.c_str()) == 0)
                platCount++;
     }
 
 
     cout << endl << endl;
     cout << "***Overall Customer Statistics***" << endl;    
     cout << "Number of Customers Type Normal: " << normCount << endl;
     cout << "Number of Customers Type Silver: " << silCount << endl;
     cout << "Number of Customers Type Gold: " << goldCount << endl;
     cout << "Number of Customers Type Platinum: " << platCount << endl;
     cout << "Total Number of Customers: " << normCount + silCount + goldCount + platCount << endl;
}
 
 
 
 
int main()
{
    Customer c[MAX_ACCOUNTS];
    string id, fname, lname, addr, pnum, ctype;
    int i = 0;
    ifstream infile;
 
    infile.open("customers.txt");
 
    while(infile >> id >> fname >> lname >> addr >> pnum >> ctype)
    {
         if(c[i].checkCustomerData(id,pnum,ctype)== true)
            c[i].setCustomer(id,fname,lname,addr,pnum,ctype);
 
         i++;
    }
 
    c[MAX_ACCOUNTS].displayTypes(c);
 
 system("pause");
 return 0;    
}

if( type != normal && type != silver && type != gold && type != plat)
    valid = false;