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class Employee: protected Person{
public:
//...
double Rate;
double GetRate() const;
double GetHours() const;
private:
double Hours;
//...
protected:
double Pay() const;
//...
};
Line 1: cout << E.GetName();
Line 2: cout << E.GetHours();
Line 3: cout << E.Address;
Line 4: cout << E.GetRate();
Line 5: cout << E.Rate;
Line 6: cout << E.Pay();
(ii) Explain why the following implementation of function Pay()would result in a
compilation error.
class Employee: protected Person{
public:
//...
double Rate;
double GetRate() const;
double GetHours() const;
private:
double Hours;
//...
protected:
double Pay() const;
//...
};
(i) The code fragment below (extracted from a main() function) has three invalid
statements. Write down the line numbers of the invalid statements and explain
why each of these statements is invalid. E is an instance of an Employee
object.
Line 1: cout << E.GetName();
Line 2: cout << E.GetHours();
Line 3: cout << E.Address;
Line 4: cout << E.GetRate();
Line 5: cout << E.Rate;
Line 6: cout << E.Pay();
class Date {
public:
Date(int day, int month, int year);
int GetYear() const;
private:
int Day;
int Month;
int Year;
};
class Person{
public:
Person(const string &name, const string &address, const
Date &date);
string GetAddress() const;
string GetName() const;
private:
string Name;
string Address;
Date DateOfBirth;
};
class Customer{
public:
Customer(const string &name, const string &address,
int day, int month, int year,double creditlimit);
void IncreaseLimit(double amount);
string GetName() const;
string GetAddress() const;
void SetBalance(double balance);
double GetBalance() const;
private:
string Name;
string Address;
int DayOfBirth;
int MonthOfBirth;
int YearOfBirth;
double CreditLimit;
double BalanceDue;
};
(b) Implement the constructor for the derived Customer class.
class Date {
public:
Date(int day, int month, int year);
int GetYear() const;
private:
int Day;
int Month;
int Year;
};
class Person{
public:
Person(const string &name, const string &address, const
Date &date);
string GetAddress() const;
string GetName() const;
private:
string Name;
string Address;
Date DateOfBirth;
};
class Customer{
public:
Customer(const string &name, const string &address,
int day, int month, int year,double creditlimit);
void IncreaseLimit(double amount);
string GetName() const;
string GetAddress() const;
void SetBalance(double balance);
double GetBalance() const;
private:
string Name;
string Address;
int DayOfBirth;
int MonthOfBirth;
int YearOfBirth;
double CreditLimit;
double BalanceDue;
};
(a) Provide an improved declaration for the Customer class that exploits the
principles of reusability. Provide the interface only.
member functions. Also define the class Pairs as an ADT that uses separate files
for the interface and the implementation. Use separate compilation and the same
program as in question 4 to test these member functions.
The function returns the value of the first parameter number of type float raised to
the value of the second parameter power of type int for all values of power greater
than or equal to 0.
1. #include <iostream>
2. using namespace std;
3. float raised_to_power( )
4. {
5. if (power < 0)
6. {
7. cout << "\nError - can't raise to a negative power\n";
8. exit(1);
9. }
10. else if ( )
11. return ( );
12. else
13. return (number * raised_to_power(number, power - 1));
14. }
15. main()
16.
17. float answer = raised_to_power(4.0,3);
18. cout << answer;
19. return 0;
20.}
(a) Complete the function header in line 3.
(b) Using the fact that any value raised to the power of 0 is 1, complete the base
case in line 10 and 11.
(c) Why do we need a base case in a recursive function?
(d) What is the purpose of the general case?
A manufacturer uses 1000 bytes as the value of 1K bytes, 1000K bytes as the value of 1MB, 1000MB as the value of 1GB. However, in computer memory, 1KB is equal to 1024 bytes. So the actual storage on a 40GB hard drive is approximately 37.25GB. Write a program that prompts the user to enter the size of the hard drive specified by the manufacturer, on the hard drive box, and outputs the actual storage capacity of the hard drive.
Input
User will need to input the hard drive size in gigabytes. Input the size after the text "Enter hard drive size in giga bytes: ".
Output
The output will be the hard drive size and the actual hard drive storage capacity. The program shall output the hard drive size inputted by the user after the "Hard drive size = ". It'll be followed by the string "Actual hard drive storage capacity = " and the actual hard drive storage capacity computed.
Sample Output
Hard drive size = 704 GB
Actual hard drive storage capacity = 655.651 GB
Program
Create a program that asks for the student's score and the number of items in a laboratory exercise. It will then compute for the grade using the formula. I recommend you to study and review on our lesson on Datatypes and Variables (Identifier).
Input
The user is required to enter two (2) inputs where the first input is the student score and the second one is the total number of items.
Output
The program will display the solution or formula (Score / Total # of Items) x 60 + 40 followed by an equal sign then the equivalent laboratory grade with two decimal places of the student. (Refer to the sample output)
++++++++++++++++++++++++++++++
Sample Input #1
21 40
Sample Output #1
(21/40)x60+40=71.50
Program
Create a program that asks for the student's score and the number of items in a laboratory exercise. It will then compute for the grade using the formula.
Input
The user is required to enter two (2) inputs where the first input is the student score and the second one is the total number of items.
Output
The program will display the solution or formula (Score / Total # of Items) x 60 + 40 followed by an equal sign then the equivalent laboratory grade with two decimal places of the student. (Refer to the sample output)
++++++++++++++++++++++++++++++
Sample Input #1
15 20
Sample Output #1
(15/20)x60+40=85.00
++++++++++++++++++++++++++++++
Sample Input #2
21 40
Sample Output #2
(21/40)x60+40=71.50
Define a class named ‘Train’ representing following members:
Data members :- - Train Number
- Train Name
- Source
- Destination
- Journey Date
- Capacity
Member functions:
- Initialise members
- Input Train data
- Display data
Write a C++ program to test the train class.
#340153 on Dec 2023