Read the following C++ program and complete it by filling in the blanks:

1 #include

2 #include

3 #include"customer.h"

4 using namespace std;

5//The header file of the class CUSTOMER used is included

6 void main()

7 {

8 ________ Credit;

9 printf("Customer Name Payment Due ");

10 printf(" ");

11 Credit=100.0;

12 for (int i=1; i<=3; i++) {

13 CUSTOMER Customer;

14 ______________.ConstCustomer(i);

15 printf ("%s", Customer.ReturnCustomerName());

16 printf(" %4.2f ", Customer.CustomerDue(Credit));

17 _______________

18 }

1 // **** Class CUSTOMER definition ****

2 // File is "customer.h"

3 class CUSTOMER

4 // Class declaration

5 {

6 private:

7 // Attributes

8 int CustomerNumber;

9 __________ CustomerName[20];

10 __________ CustomerBalance;

11 char CustomerPhone[15];

12 public:

13 CUSTOMER ()

14 {

15 // Constructor is actually implemented by the method

16 // void ConstCustomer(int)

17 };

18 // Operations

19 // The following procedure simulates the system to read a

20 //database/data file which records information of customer

21 void ConstCustomer(int CN) {

22 CustomerNumber=CN;

23 if (CustomerNumber==1)

24 { strcpy_s(CustomerName, "John ");

25 CustomerBalance=-200.05;

26 strcpy_s(CustomerPhone, "123 1234 ");

27 }

28 if (CustomerNumber==2)

29 { strcpy_s(CustomerName, "Anne ");

30 CustomerBalance=-200;

31 strcpy_s(CustomerPhone, "123 2345 ");

32 }

33 if (CustomerNumber==3)

34 { strcpy_s(CustomerName, "Greg ");

35 CustomerBalance=100.78;

36 strcpy_s(CustomerPhone, "123 7890 ");

37 }

38 }

39 // Next are methods of the CUSTOMER class...

40 __________ _____________________

41 {return CustomerName;};

42 __________ *ReturnCustomerPhone()

43 {return CustomerPhone;};

44 double ReturnCustomerBalance()

45 {return CustomerBalance;};

46 double CustomerDue(double CR) {

47 _____________ ____________ ______

48 if ((CustomerBalance+CR)<0)

49 { DueAmount=(CustomerBalance+CR)*-1; }

50 else

51 { DueAmount=0; };

52 _____________ (DueAmount);

53 }

54 _____________________