To calculate factorial of a given number using copy constructor.

ALGORITHM:
STEP 1: Start the program.
STEP 2: Declare the class name as Copy with data members and member functions.
STEP 3: The constructor Copy() with argument to assign the value.
STEP 4: To cal the function calculate() do the following steps.
STEP 5: For i=1 to var do
STEP 6: Calculate fact*i to assign to fact.
STEP 7: Increment the value as 1.
STEP 8: Return the value fact.
STEP 9: Print the result.
STEP 10: Stop the program.

PROGRAM:

01	#include<iostream.h>

02	#include<conio.h>

03	class copy

04

{

05	int var,fact;

06

public:

07

08	copy(int temp)

09

{

10	var = temp;

11

}

12

13	double calculate()

14

{

15

fact=1;

16	for(int i=1;i<=var;i++)

17

{

18	fact = fact * i;

19

}

20	return fact;

21

}

22

};

23	void main()

24

{

25

clrscr();

26

int n;

27	cout<<"\n\tEnter the Number : ";

28

cin>>n;

29	copy obj(n);

30	copy cpy=obj;

31	cout<<"\n\t"<<n<<" Factorial is:"<<obj.calculate();

32	cout<<"\n\t"<<n<<" Factorial is:"<<cpy.calculate();

33

getch();

34

}

Output:
Enter the Number: 5
Factorial is: 120
Factorial is: 120