1. CS 201(Introduction To Programming)
TAMOOR SAFDER BC

2. (Class and Objects) Class
Let’s have a look on the structure of a class. It is very similar to the struct keyword. Keyword class is used and the braces enclose the definition of the class i.e.
class name_of_class {
// definition of class }
Object
We have to use the name of the object, a dot operator and the data member of structure to be accessed. The data members are of normal data types like int, float, char etc.
Other data types can also be used. Let’s consider an example of Date Class shown in the following statement.
class Date
int Day; int month; int year; };

3. constructor
// constructor of class
Date(); {
Date(int,int);
Date(int,int,int); }
Destructor
// defining the constructor
// default constructor. setting the date to a default date Date::
Date()
day = 1; month = 1; year = 1900;

4. Private
public:
void display(); // to display the date on the screen
void setDay(int i); // setting the day
void setMonth(int i); // setting the month
void setYear(int i); // setting the year
Public scopes
private: {
int day, month, year; };

5. int main() {
Date date1, date2(12,12), date3(25,12,2002); // taking objects of Date class
// displaying the dates on the screen
date1.display();
date2.display();
date3.display(); }
Following is the output of the above program.
The default constructor is called
The constructor with two arguments is called
The constructor with three arguments is called
The date is
The date is
The date is
The object has destroyed