class 12 computer project

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Certificate

Name: Rohan Gupta

Class & Section: XII A

School: Lucknow Public School

Session: 2015-2016

This is to be certified to be the bonafide work of the student of

computer laboratory during academic session 2015-2016.

Project work is successfully completed in the computer practical for the

AISSCE.

As prescribed by CBSE in the year 2015-2016.

____________________ ___________________

Examiner`s Signature Teacher`s Signature


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AcknowledgementI am extremely grateful and remain indebted to my teacher & guide Mrs. Narayani Singh forbeing a source of inspiration and for her constant support in the design, implementation and

evaluation of the project. I am thankful to her constant criticism and invaluable suggestion,

which benefitted us a lot while developing the project. She has been a constant source of

inspiration and motivation for hard work & has been very co-operative throughout this project

work.

I also express my gratitude to my principal, Ms. Bharti Gosain for providing us the

infrastructure to carry out the project and to all the staff members who were directly &

indirectly instrument in enabling us to stay committed for the project. At last I would like to

thank my parents who helped me in various ways with their unconditional support and

affection during the years and always being there for me. They inspired my every step ahead to

put in my best.


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Contents


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IntroductionThe C++ programming language was developed at AT&T Bell laboratories in the early 1980s by

Bjarne Stroustrup. He found C lacking for simulations and decided to extend the language by

adding features form his favorite language, Simula 67. Simula 67 was one of the earliest object

oriented language. Bjarne Stroustroup called it C with classesor New C during

development. The name C++ (pronounced C plus plus) was coined by Rick Mascitti where

++is the C increment operator. Ever since its birth, C++ evolved to cope with problems

encountered by users, and through discussions at AT&T. However, the maturation of the C++

language is attested by two recent events:

(i)The formation of an ANSI (American National Standard Institute)

And (ii) the publication of The Annotated C+ Reference

Manual by Ellis and Stroustrup.

Many other programming languages have been influenced by C++, including C#, Java, and

newer versions of C (after 1998).


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Function Overloading

Program 1: To illustrate the working of Function Overloading. Calculating

interest amount.

#include

#include

void amount(float princ, int time, float rate)

{

cout


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}

void amount(int time, float rate)

{

cout


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amount(6,0.07F);

return 0;

}

OUTPUT:


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Classes and Objects

Program 2: Using class to store price list of 5 items and to print the largest price

as well as the sum of all prices.

#include

#include

class ITEM {

int itemcode[5];

float it_price[5];

public:

void initialize(void);

float largest(void);

float sum(void);

void display_item(void);

};

void ITEM::initialize(void)

{

for(int i=0;i


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}

float ITEM::largest(void)

{

float large=it_price[0];

for(int i=1;i


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}

cout


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break;

}

}

while(ch>=1&&ch


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Program 3: To illustrate the working of a function returning an object.

#include

class Distance {

int feet, inches;

public:

void getdata(int f,int i)

{feet=f;inches=i;}

void printit(void)

{

cout


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cout


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Program 4: To illustrate order of constructor invocation

#include

#include

class Subject { int days;

int subjectno;

public:

Subject(int d=123,int sn=101);

void printsub(void)

{

cout


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rollno=0;

marks=0.0;

}

void getval(void)

{

coutrollno>>marks;

cout


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}

void print(void)

{

stud.print();

sub.printsub();

cout


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Program 5: To illustrate the use of overloaded Constructor

#include

#include

class Deposit { long int principal;

int time;

float rate;

float total_amt;

public: Deposit();

Deposit(long p, int t, float r);

Deposit(long p, int t);

Deposit(long p, float r);

void calc_amt(void); void display(void); };

Deposit::Deposit()

{principal=time=rate=0.0;}

Deposit::Deposit(long p, int t, float r)

{ principal=p; time=t; rate=r;}

Deposit::Deposit(long p, int t)

{principal=p; time=t; rate=0.08;}

Deposit::Deposit(long p, float r)

{principal=p; time=2; rate=r;}

void Deposit::calc_amt(void)

{total_amt=principal+(principal*time*rate)/100;}

void Deposit::display(void)

{ cout


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cout


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Program 6:To show working of virtual base class.

#include#includeclass Base

{public:

int a;};

class D1:virtual public Base{

public:int b;

};class D2:virtual public Base

{public:

int c;};class D3:public D1,public D2

{public:

int total;};

int main(){

clrscr();D3 ob;ob.a=25;ob.b=50;ob.c=75;ob.total=ob.a+ob.b+ob.c;cout


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Data File Handling

Program 7: To illustrate of working with multiple files simultaneously

#include

#include

#include

int main()

{

system("cls");

ifstream filin1, filin2;

filin1.open("Stuname.txt",ios::in);

filin2.open("Stumarks.txt",ios::in);

char line[80];

cout


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cout


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Program 8: To write and read a structure using write() and read()

function using a binary file

#include

#include

#include

#include

struct customer { char name[51];

float balance; };

int main()

{

system("cls");

customer savac;

strcpy(savac.name,"Toby Marshall");

savac.balance=213466.75;

ofstream fout;

fout.open("Saving",ios::out|ios::binary);

if(!fout)

{

cout


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cout


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Program 9: To append data in a file

#include

#include

class stu { int rollno;

char name[25];

char Class[4];

float marks;

char grade;

public:

void getdata()

{ coutrollno;

coutname;

coutClass;

coutmarks;

if(marks>=75) grade='A';

else if(marks>=60) grade='B';

else if(marks>=50) grade='C';

else if(marks>=40) grade='D';

else grade='F';

}

void putdata()

{

cout


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int main()

{

ofstream fo("stu.dat", ios::app|ios::binary);

char ans='y';

while(ans=='y')

{

s1.getdata();

fo.write((char *) &s1,sizeof(s1));

cout


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Progra

class 12 computer project

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