Computer Practical File C++

8/12/2019 Computer Practical File C++

http://slidepdf.com/reader/full/computer-practical-file-c 1/46

COMPUTERPRACTICAL FILE

Using concepts of ObjectOriented Programming

with C++

SUSHANT MONGIA

A2305111007

2-ECE-01-(X)



Program List Date:

1) WAP in C++ to find whether the number entered by theuser is even or odd.

14/12/2011

2) WAP in C++ to print the table of a number entered bythe user.

14/12/2011

3) WAP in C++ to find the factorial of a number entered bythe user.

21/12/2011

4) WAP in C++ to swap two numbers using call by value. 21/12/2011

5) WAP in C++ to implement inline function. 04/01/2012

6) WAP in C++ to implement friend function with functionsdefinitions inside the class.

04/01/2012

7) WAP in C++ using friend function to add two complexnumbers with functions definitions outside the class.

11/01/2012

8) WAP in C++ using static data member as a counter. 11/01/2012

9) WAP in C++ to implement array of objects, creating aclass employee and accepting and displaying multipledatasets accepted by the user using array of objects.

18/01/2012

10) WAP in C++ to implement default constructor. 18/01/2012

11) WAP in C++ to implement parameterized constructor. 25/01/2012

12) WAP in C++ to implement copy constructor. 25/01/2012



13) WAP in C++ to implement Single inheritance. 01/02/2012

14) WAP in C++ to implement multi-level inheritance. 01/02/2012

15) WAP in C++ to implement multiple inheritance. 08/02/2012

16) WAP in C++ to implement hierarchical inheritance. 08/02/2012

17) WAP in C++ to implement hybrid inheritance. 22/02/2012

18) WAP in C++ to implement virtual base class. 22/02/2012

19) Write a program to illustrate application of exceptionhandling.

No output

29/02/2012

20) Write a program to copy the contents of one file toother.

No output

07/03/2012

21) Write a program to read from two files simultaneously. 14/03/2012



1. WAP in C++ to find whether the number entered by the user is even or odd.

#include<iostream.h>

#include<conio.h>

void main ()

{

int i;

cout << "Enter an integer"<< endl;

cin >> i;

if ( i % 2== 0 )cout << i << " is even"<<endl;

else

cout << I << " is odd "<<endl;

getch();

}

Output:

Enter an integer

2

2 is even



2. WAP in C++ to print the table of a number entered by the user.


#include<conio.h>

void main ()

{

int a ;

cout << "Enter an integer" << endl ;

cin >> a ;

for ( int i = 1 ; i <= 10 ; i++)cout << a << " x " << i << " = " << i*a << "\n" ;

getch();

}

Output:

Enter an integer

5

5 x 1 =5

5 x 2 =10

5 x 3 =15

5 x 4 =20

5 x 5 =25

5 x 6 =30

5 x 7 =35

5 x 8 =40

5 x 9 =45

5 x 10 =50



3. WAP in C++ to find the factorial of a number entered by the user.


#include<conio.h>

void main ()

{

int a ;

cout << " Please enter an integer " << endl ;

cin >> a ;

for ( int i = a - 1 ; i >= 1 ; i--)a = a * i ;

cout << " Factorial = " << a << "\n" ;

getch();

}

Output:

Enter an integer

4

Factorial = 24



4. WAP in C++ to swap two numbers using call by value.


#include<conio.h>

void swap ( int , int ) ;

void swap ( int x , int y )

{

int temp;

temp = x;

x = y; y = temp;

cout << "\n After swapping \n";

cout << " a = " << x <<"\n";

cout << " b = " << y ;

}

void main ()

{

int a , b ;

cout << " Enter a " ;

cin >> a ; Output:

cout << " Enter b "; Enter a 20

cin >> b ; Enter b 65

swap( a , b ); After swapping

getch(); a = 65

} b = 20



5. WAP in C++ to implement inline function.


#include<conio.h>

inline float mul ( float x , float y )

{

return ( x * y ) ;

}

inline double div ( double p , double q )

{return ( p / q ) ;

}

void main ()

{

float a = 12.345 , b = 9.82 ;

cout << mul(a,b) << "\n" ;

cout << div(a,b) << "\n" ;

getch();

}

Output:

121.227898

1.257128



6. WAP in C++ to implement friend function with functions definitions inside theclass.


#include<conio.h>

class sample

{

int a;

int b;

public:

void setvalue() { a=25 ; b=40 ; }

friend float mean( sample s ) ;

};

float mean ( sample s)

{

return float ( s.a + s.b ) / 2.0 ;

} Output:

void main () Mean value = 32.5

{

sample x;

x.setvalue();

cout << "Mean value = " << mean(x) << "\n" ;

getch();

}



7. WAP in C++ using friend function to add two complex numbers with functionsdefinitions outside the class.


#include<conio.h>

int r , i ;

class complex

{

int real;

int imag;

public:

void get() ;

friend void add() ;

} c1 , c2 ;

void complex :: get()

{

cout << "\n Enter real part: " ;

cin >> real ;

cout << "Enter imaginary part: ";

cin >> imag ;

}

void add()

{

r = c1.real + c2.real ;



i = c1.imag + c2.imag ;

}

void main ()

{

c1.get();

c2.get();

add();

cout << " \n complex no is " << r << " + i " << i ;getch();

}

Output:

Enter real part: 10

Enter imaginary part: 21

Enter real part: 5

Enter imaginary part: 7

complex no is 15 + i 28



8. WAP in C++ using static data member as a counter.


#include<conio.h>

class item

{

static int count;

int number;

public:

void getdata( int a ){

number = a ;

count ++ ;

}

void getcount( void )

{

cout << " count : " ;

cout << count << "\n" ;

}

} ;int item :: count ;

void main ()

{

item a , b , c ;



a.getcount();

b.getcount();

c.getcount();

a.getdata(100);

b.getdata(200);

c.getdata(300);

cout << " After reading data " << "\n" ;

a.getcount();

b.getcount();c.getcount();

getch();

}

Output:

count : 0

count : 0

count : 0

After reading data

count : 3

count : 3

count : 3



9. WAP in C++ to implement array of objects, creating a class employee andaccepting and displaying multiple datasets accepted by the user using array ofobjects.


#include<conio.h>

class employee

{

char name[30];

float age;

public:

void getdata( void ) ;

void putdata( void ) ;

} ;

void employee :: getdata(void)

{

cout << "Enter name : " ;

cin >> name ;

cout << "Enter age : " ;

cin >> age ;

}

void employee :: putdata(void)

{

cout << "Name : " << name << "\n" ;



cout << "Age : " << age << "\n" ;

}

const int size=3 ;

void main ()

{

employee manager[size];

for(int i = 0 ; i < size ; i++)

{

cout << "\n Details of manager" << i+1 << "\n" ;manager[i].getdata();

}

cout << "\n" ;

for(i=0;i<size;i++)

{

cout << " \n Manager " << i+1 << "\n" ;

manager[i].putdata();

}

getch();

}

Output:



Details of manager1

Enter name : ABC

Enter age : 25

Details of manager2

Enter name : DEF

Enter age :28

Details of manager3

Enter name : GHI

Enter age : 32Manager1

Name : ABC

Age : 25

Manager2

Name : DEF

Age :28

Manager3

Name : GHI

Age : 32

10. WAP in C++ to implement default constructor.




#include<conio.h>

class defa

{

int a ;

int b ;

public:

defa ( )

{cout << "Default constructor is called" << "\n" ;

}

} ;

void main ()

{

defa D ;

getch();

}

Output:Default constructor is called

11. WAP in C++ to implement parameterized constructor.




#include<conio.h>

class para

{

int a ;

int b ;

public:

para ( int x , int y )

{a = x ;

b = y ;

}

void disp()

{

cout << "a = " << a << "\n b = " << b ;

}

} ;

void main ()

{

para P( 100 , 200 ) ; Output:

P.disp(); a = 100

getch(); b = 200

}

12. WAP in C++ to implement copy constructor.




#include<conio.h>

class code

{

int id ;

public:

code ( )

{ }

code ( int a ){

id = a ;

}

code ( code & x)

{

id = x.id ;

}

void display(void)

{

cout << id ;

}} ;

void main ()



{

code A(100);

code B(A);

code C = A;

code D;

D = A;

cout << "\n id of A: " ; A.display() ;

cout << "\n id of B: " ; B.display() ;

cout << "\n id of C: " ; C.display() ;cout << "\n id of D: " ; D.display() ;

getch();

}

Output:

id of A: 100

id of B: 100

id of C: 100

id of D: 100

13. WAP in C++ to implement Single inheritance.




#include<conio.h>

class B

{

int a ;

public:

int b ;

void set_ab();

int get_a();void show_a();

} ;

class D : public B

{

int c ;

public:

void mul ();

void display();

};

void B :: set_ab()

{a = 5 ;

b = 10 ;

}

int B :: get_a()



{

return a ;

}

void B :: show_a()

{

cout << "a = " << a << "\n" ;

}

void D :: mul ()

{c = b * get_a() ;

}

void D :: display()

{

cout << "a = " << get_a() << "\n";

cout << "b = " << b << "\n" ;

cout << "c = " << c << "\n\n" ;

}

void main ()

{

D d ;d.set_ab();

d.mul();

d.show_a();

d.display();



d.b = 20 ;

d.mul ();

d.display();

getch();

}

Output:

a = 5

a = 5

b = 10

c = 50

a = 5

b = 20

c = 100

14. WAP in C++ to implement multi-level inheritance.




#include<conio.h>

class student

{

protected:

int roll_number;

public:

void get_number(int);

void put_number(void);} ;

void student :: get_number(int a)

{

roll_number = a ;

}

void student :: put_number()

{

cout << "Roll number : " << roll_number << "\n" ;

}

class test : public student

{protected:

float sub1;

float sub2;

public:



void get_marks(float,float);

void put_marks(void);

};

void test :: get_marks(float x, float y)

{

sub1 = x;

sub2 = y;

}

void test :: put_marks(){

cout << "Marks in sub 1 = " << sub1 << "\n" ;

cout << "Marks in sub 2 = " << sub2 << "\n" ;

}

class result : public test

{

float total ;

public:

void display(void);

};

void result :: display(){

total = sub1 + sub2 ;

put_number();

put_marks();



cout << "Total = " << total << "\n" ;

}

void main ()

{

result student1;

student1.get_number(111);

student1.get_marks(75.0,59.5);

student1.display();

getch();}

Output:

Roll number : 111

Marks in sub1 = 75

Marks in sub2 = 59.5

Total = 134.5

15. WAP in C++ to implement multiple inheritance.




#include<conio.h>

class M

{

protected:

int m ;

public:

void get_m(int);

};class N

{

protected:

int n;

public:

void get_n(int);

};

class P : public M, public N

{

public:

void display(void);};

void M :: get_m(int x)

{

m = x ;



}

void N :: get_n(int y)

{

n = y ;

}

void P :: display(void)

{

cout << "m = " << m << "\n" ;

cout << "n = " << n << "\n" ;cout << "m * n = " << m*n << "\n" ;

}

void main ()

{

P p;

p.get_m(10);

p.get_n(20);

p.display();

getch();

}

Output:m = 12

n = 3

m*n =36

16. WAP in C++ to implement hierarchical inheritance.




#include<conio.h>

class A

{

int a,b;

public :

void getdata()

{

cout << "\n Enter the value of a and b " ;cin >> a >> b;

}

void putdata()

{

cout << "\n The value of a is : " << a << " and b is " << b;

}

};

class B : public A

{

int c , d;

public :void indata()

{

cout << "\n Enter the value of c and d ";

cin >> c >> d;



}

void outdata()

{

cout << "\n The value of c " << c << " and d is " << d;

}

};

class C: public A

{

int e,f;public :

void input()

{

cout<< "\n Enter the value of e and f ";

cin >> e >> f ;

}

void output()

{

cout << " \nthe value of e is " << e << " and f is " << f;

}

};

void main()

{

B obj1;



C obj2;

obj1.getdata();

obj1.indata();

obj2.getdata();

obj2.input();

obj1.putdata();

obj1.outdata();

obj2.output();

getch();}

Output:

Enter the value of a and b 2 8

Enter the value of c and d 15 56

Enter the value of a and b 54 32

Enter the value of e and f 85 52

The value of a is : 2 and b is 8

The value of c is : 15 and d is 56

The value of e is : 85 and f is 52

17. WAP in C++ to implement hybrid inheritance.




#include<conio.h>

class student

{

protected:

int roll_number ;

public:

void get_number(int a)

{roll_number = a ;

}

void put_number(void)

{

cout << "Roll no. : " << roll_number << "\n" ;

}

};

class test : public student

{

protected:

float part1, part2;public:

void get_marks(float x, float y)

{

part1 = x ; part2 = y ;



}

void put_marks(void)

{

cout << "Marks obtained : " << "\n"

<< "part1 = " << part1 << "\n"

<< "part2 = " << part2 << "\n" ;

}

};

class sports{

protected:

float score ;

public:

void get_score(float s)

{

score = s ;

}

void put_score(void)

{

cout << "Sports wt: " << score << "\n\n" ;}

};

class result : public test, public sports

{



float total ;

public :

void display(void);

};

void result :: display(void)

{

total = part1 + part2 + score ;

put_number();

put_marks();put_score();

cout << "Total score : " << total << "\n" ;

}

void main()

{

result student_1;

student_1.get_number(1234);

student_1.get_marks(27.5,33.0);

student_1.get_score(6.0);

student_1.display();getch();

}

Output:



Roll no. : 1234

Marks obtained :

part1 = 27.5

part2 = 33

Sports wt: 6

Total score: 66.5



18. WAP in C++ to implement virtual base class.


#include<conio.h>

class student

{

protected:

int roll_number;

public:

void get_number(int a){

roll_number = a;

}

void put_number(void)

{

cout << "Roll No: " << roll_number << "\n";

}

};

class test : virtual public student

{

protected:float part1, part2;

public:

void get_marks(float x, float y)

{



part1 = x; part2 = y;

}

void put_marks(void)

{

cout << "Marks obtained: " << "\n"

<< "Part1 = " << part1 << "\n"

<< "Part2 = " << part2 << "\n";

}

};class sports : public virtual student

{

protected:

float score ;

public:

void get_score(float s)

{

score = s;

}

void put_score(void)

{cout << "Sports wt: " << score << "\n\n";

}

};

class result : public test, public sports



{

float total;

public:

void display(void)

{

total = part1 + part2 + score;

put_number();

put_marks();

put_score();cout << "Total score: " << total << "\n";

}

};

void main()

{

result student_1;

student_1.get_number(678);

student_1.get_marks(30.5, 25.5);

student_1.get_score(7.0);

student_1.display();

getch();}

Output:



Roll no. : 678

Marks obtained :

part1 = 38.5

part2 = 25.5

Sports wt: 7

Total score: 63



19. Write a program to illustrate application of exception handling.


#include<conio.h>

void main()

{

int a,b;

cout << "Enter Values of a and b \n";

cin >> a;

cin >> b;int x = a-b;

try

{

if(x != 0)

{

cout << "Result (a/x) = " << a/x << "\n";

}

else // There is an exception

{

throw(x) ; // Throws int object

}}

catch (int i) // Catches the exception

{

cout<<"Exception cought: DIVIDE BY ZERO\N";



}

cout << "END";

getch();

}



20. Write a program to copy the contents of one file to other.


#include<conio.h>

#include<fstream.h>

#include<string.h>

#include<process.h>

void main()

{

fstream file1, file2;char ch;

clrscr();

file1.open("file1.txt",ios :: out);

cout << "\n\t Press 'enter key' to quit \n\n";

cout << "\n Enter the data \n";

cin.get(ch);

while(ch != '\n')

{

file1.put(ch);

cin.get(ch);

}file1.close();

file1.open("file1.txt",ios :: in);

if(!file1)

{



cout<< "\n File1 not found !! \n";

getch();

exit(0); // aborting…

}

cout << "\n First file contents \n";

while(file1)

{

file1.get(ch);

cout.put(ch);}

file1.seekg(0); /* copying process..... */

file2.open("file2.txt",ios :: out );

cout << "\n\n First file contents copied to second file... \n";

while(file1)

{

file1.get(ch);

file2.put(ch);

}

file1.seekg(0);

file2.close();file2.open("file1.txt",ios :: in);

if(!file1)

{

cout<< "\n File1 not found !! \n";



getch();

exit(0); // aborting…

}

cout << "\n Second file contents \n";

while(file2)

{

file2.get(ch);

cout.put(ch);

}file2.close();

getch();

}

21. Write a program to read from two files simultaneously.



#include<fstream.h>

#include<conio.h>

#include<stdlib.h>

void main( )

{

clrscr();

const int SIZE = 80;

char line[SIZE];

//First creating two filesofstream fout1,fout2;

fout1.open("country");

fout1<<"India\n";

fout1<<"Japan\n";

fout1<<"Sri Lanka\n";

fout1.close();

fout2.open("capital");

fout2<<"New Delhi\n"<<"Tokyo\n"<<"Colombo\n";

fout2.close();

ifstream fin1, fin2; // create two input streams

fin1.open("country");fin2.open("capital");

cout<<"The contents of two files are given below:\n";

fin1.getline(line,80);

cout<<line<<"\n";




cout<<line<<"\n";


cout<<line<<"\n";


cout<<line<<"\n";


cout<<line<<"\n";

fin2.getline(line,80);cout<<line<<"\n";

fin1.close();

fin2.close();

getch();

}

Output:

The contents of the two files are given below:

India

New Delhi

Japan

Tokyo

Sri Lanka

Colombo

Documents

Computer Practical File C++