SE Computer SPPU Object Oriented Programming (OOP) all codes and output (2019 pattern)
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Q1. Implement a class complex which
represents the complex number datatypes.Implement the following operations:
1.Constructor(including a default constructor which creates the complex
number 0+0i);
2.Overload operator + to add two complex numbers.
3.Overload operator * to multiply two complex numbers.
4. Overload operator << and >> to print and read complex
numbers.
Code:
#include<iostream>
using
namespace std;
class
Complex
{
public
:
float
real,img;
Complex()
{}
Complex
operator +(Complex);
Complex
operator *(Complex);
friend
ostream & operator <<(ostream&,Complex&);
friend
istream & operator >>(istream&,Complex&);
};
Complex
Complex::operator +(Complex obj)
{
Complex
temp;
temp.real=real+obj.real;
temp.img=img+obj.img;
return
temp;
}
Complex
Complex::operator *(Complex obj)
{
Complex
temp;
temp.real=real*obj.real-img*obj.img;
temp.img=real*obj.img+img*obj.real;
return
temp;
}
//definition
of istream
istream&
operator >>(istream& is,Complex& obj)
{
is>>obj.real;
is>>obj.img;
return is;
}
//definition
of ostream
ostream&
operator <<(ostream& os,Complex& obj)
{
os<<obj.real;
os<<"+"<<obj.img<<"i";
return os;
}
int main()
{
Complex
a,b,c,d,e;
cout<<endl<<"enter
1st no"<<endl;
cout<<"enter
real and img. no = "<<endl;
cin>>a;
cout<<endl<<"enter
2nd no"<<endl;
cout<<"enter
real and img. no = "<<endl;
cin>>b;
cout<<endl<<"arithmatic
operations are"<<endl;
c=a+b;
cout<<"addition
is= "<<c<<endl;
d=a*b;
cout<<"multiplication
is ="<<d<<endl<<endl;
return 0;
}
Output:
Q2. Develop a program in C++ to create a
database of student’s information system containing the
following information: Name, Roll number,
Class, Division, Date of Birth, Blood group, Contact
address, Telephone number, Driving license no.
and other. Construct the database with
suitable member functions. Make use of
constructor, default constructor, copy constructor,
destructor, static member functions, friend
class, this pointer, inline code and dynamic
memory allocation operators-new and delete as
well as exception handling.
Code:
#include<iostream>
#include<string>
#include<cstring>
#include<stdlib.h>
using namespace std;
class student
{ int
roll;
char
name[30];
float marks;
public:
student()
{
roll=0;
marks=0;
strcpy(name,"");
}
student(int roll,char name[30], float marks)
{
this->roll=roll;
this->marks=marks;
strcpy(this->name,name);
}
void accept()
{
cout<<"Enter the name";
cin>>name;
cout<<"Enter
the rollno";
cin>>roll;
cout<<"Enter the marks";
cin>>marks;
}
void display()
{
cout<<"\n\nNAME:"<<name;
cout<<"\n\nROLLNO:"<<roll;
cout<<"\n\nMARKS:"<<marks;
}
};
int main()
{
int
i,ch,n;
student s[10];
while(1)
{
cout<<"\n1.CREATE\n2.DISPLAY\n3.EXIT";
cout<<"\n Enter your choice ";
cin>>ch;
switch(ch)
{ case
1:
cout<<"\n Enter how many student information you want to
create";
cin>>n;
for(i=0;i<n;i++)
{ cout<<"enter
information of"<<i+1<<"th student";
s[i].accept();
}
break;
case 2:
cout<<"Student database is as follows";
for(i=0;i<n;i++)
s[i].display();
break;
case
3: exit(0);
}
}return
0;
Output:
Q3. Imagine a publishing company which
does marketing for book and audio cassette versions. Create a class
publication that stores the title (a string)
and price (type float) of publications. From this class derive two classes:
book which adds a page count (type int) and tape
which adds a playing time in minutes (type float).
Write a program that instantiates the book and
tape class, allows user to enter data and displays the data members.
If an exception is caught, replace all the data
member values with zero values.
Code:
#include
<iostream>
using
namespace std;
class
publication
{ public:
float price;
string name;
publication()
{
name="none";
price=0.0;
}
void getdata(string s)
{
cout<<"\n Enter the name of
the"<<s<<":";
cin>>name;
bool flag=false;
while(flag==false)
{
cout<<"\n Enter the
price of the"<<s<<":";
cin>>price;
try
{
if(price<=0)
throw price;
else
flag=true;
}
catch(float x)
{
price=0.0;
cout<<"\n You have
entered price is invalid ";
cout<<"\n The price
has set to "<<price;
cout<<"\n Enter
valid input";
}
}
}
inline
string getname()
{
return name;
}
inline
float getprice()
{
return price;
}
};
class book:
public publication
{
public:
int pages;
book()
{
pages=0;
}
void getpages()
{
bool flag=false;
while(flag==false)
{
cout<<"\n Enter the no
of pages";
cin>>pages;
try
{
if(pages<=0)
throw pages;
else
flag=true;
}
catch(int x)
{
pages=0;
cout<<"\n You have
entered no of pages is invalid ";
cout<<"\n The no of
pages has set to "<<pages;
cout<<"\n Enter
valid input";
}
}
}
void display()
{ cout<<"\t\n book is
Found";
cout<<"\t\n Details of
book";
cout<<"\t\n Name of the
Book"<<getname();
cout<<"\t\n No of
pages"<<pages;
cout<<"\t\n The price
is"<<getprice();
}
};
class tape:
public publication
{
public:
float time;
tape()
{
time=0.0;
}
void gettime()
{
bool flag=false;
while(flag==false)
{
cout<<"\n Enter the
playing time of tape in mins";
cin>>time;
try
{
if(time<=0)
throw time;
else
flag=true;
}
catch(float x)
{
time=0.0;
cout<<"\n You have
entered time is invalid ";
cout<<"\n The time
has set to "<<time;
cout<<"\n Enter
valid input";
}
}
}
void
display()
{ cout<<"\t\n Audio cassette is
Found";
cout<<"\t\n Details of Audio
cassette";
cout<<"\t\n Name of the Tape
"<<getname();
cout<<"\t\n Playing
time"<<time<<"Mins";
cout<<"\t\n The price
is"<<getprice();
}
};
int main()
{
int choice;
string n;
book objb;
tape objt;
cout<<"\t\n Welcome to inheritance Program";
do
{
cout<<"\n Menu";
cout<<"\t1.Insert a
book\n\t2.Insert an audio cassette\n\t3.Display Book Details";
cout<<"\n\t4.Display audio
cassttee details\n\t5.Exit";
cout<<"\t\n Enter the
choice";
cin>>choice;
switch(choice)
{
case 1:
objb.getdata("book");
objb.getpages();
cout<<"\t\n
book is being searched"<<endl;
break;
case 2: objt.getdata("Audio
Cassttee");
objt.gettime();
cout<<"\t\n
Audio Cassttee is being searched"<<endl;
break;
case 3: try
{
if(objb.getname()=="NONE")
throw 3;
else
{
objb.display();
cout<<"\t\n We will hope that you purchase book again";
}
}
catch(int x)
{
cout<<"\t\n No
book has been searched yet";
cout<<"\t\n
choose correct option";
}
break;
case 4: try
{
if(objt.getname()=="NONE")
throw 3;
else
{
objt.display();
cout<<"\t\n We will hope that you purchase audio Cassttee
again";
}
}
catch(int x)
{
cout<<"\t\n No
audio cassette has been searched yet";
cout<<"\t\n
choose correct option";
}
break;
case 5: cout<<"\t\n
..........VISIT AGAIN..........";
break;
}
}while(choice!=5);
cout<<"\t\n End of the
program";
cout<<"\t\n Thnak you";
return 0;
}
Output: 
Q4. Write
a C++ program that creates an output file, writes information to it, closes the
file, open
it again
as an input file and read the information from the file.
Code:
#include
<iostream>
#include
<fstream>
using
namespace std;
class
employee
{
char
name[20];
int emp_id;
float
salary;
public:
void
accept()
{
cin>>name;
cin>>emp_id;
cin>>salary;
}
void
display()
{
cout<<"\n"<<name<<"\t"<<emp_id<<"\t"<<salary;
}
};
int main()
{
employee
o[5]; // employee o; array of object
fstream f;
int i,n;
f.open("input.txt");
//create employee
cout<<"\n
How many employee information wanted to store:";
cin>>n;
cout<<"\n
Enter information of 3 employees (Enter name, emp_id, salary)";
for(i=0;i<n;i++)
{
cout<<"\n
Enter information of "<<i<<" employee";
o[i].accept();
//accept input from user
f.write((char
*)&o[i], sizeof(o[i])); //write object in employee
}
f.close();
f.open("input.txt",
ios::in);
cout<<"\n
Information of employee is as follows";
for(i=0;i<n;i++)
{
f.read((char*)&o[i],
sizeof(o[i])); //read data from employee
o[i].display();
}
f.close();
return 0;
}
Output:
Q5. Write a function template for
selection sort that inputs,sorts and outputs an integer array
and a float array.
Code:
#include<iostream>
#define
size 10
using
namespace std;
int n;
template<class
T>
void
selection(T A[size])
{
int i,j,min;
T temp;
for(i=0;i<n;i++)
{
min=i;
for(j=i+1;j<n;j++)
{
if(A[j]<A[min])
min=j;
}
temp=A[i];
A[i]=A[min];
A[min]=temp;
}
cout<<"\n The sorted list
is:...";
for(i=0;i<n;i++)
cout<<"\t"<<A[i];
}
int main()
{
int i,A[size];
float B[size];
cout<<"Selection
Sort";
cout<<"\nHandling
Interger Elements";
cout<<"\nHow
Many Elements Are There???";
cin>>n;
cout<<"\nEnter
the integer numbers:-";
for(i=0;i<n;i++)
cin>>A[i];
selection(A);
cout<<"\nHandling
Float Elements";
cout<<"\nHow
Many Elements Are There???";
cin>>n;
cout<<"\nEnter
the Float numbers";
for(i=0;i<n;i++)
cin>>B[i];
selection(B);
cout<<"\n";
return 0;
}
OUTPUT:
Q6. Write
C++ program using STL for sorting and searching with user defined records such
as
person
record(Name, DOB, Telephone number), Item record (Item code, name,
cost,quantity)
using vector container.
Code:
#include
<iostream>
#include <vector>
#include
<string>
#include
<algorithm>
using
namespace std;
class
Record{
public:
int item_code, quantity;
float cost;
string name;
bool operator == (const Record
&o1){
if (name ==
o1.name)
return
1;
return 0;
}
bool operator < (const Record
& o1){
if(item_code <
o1.item_code)
return
1;
return 0;
}
};
vector <Record>r1;
void insert();
void display();
void print1(Record &r1);
void search();
void del();
void insert(){
Record o1;
cout<<"\nEnter
name: "; cin>>o1.name;
cout<<"\nEnter
item code: "; cin>>o1.item_code;
cout<<"\nEnter
required quantity: "; cin>>o1.quantity;
cout<<"\nEnter
cost: "; cin>>o1.cost;
r1.push_back(o1);
}
void display(){
for_each(r1.begin(),
r1.end(), print1);
}
void print1(Record &r1){
cout<<"\nName
is: "<<r1.name<<endl;
cout<<"Item_code
is: "<<r1.item_code<<endl;
cout<<"Quantity:
"<<r1.quantity<<endl;
cout<<"Cost:
"<<r1.cost<<endl;
}
void search(){
Record o1;
vector
<Record>::iterator i;
cout<<"\nEnter
name to be searched: ";
cin>>o1.name;
i=find(r1.begin(),r1.end(),o1);
if(i==r1.end()){
cout<<"\n
Not found";
}
else{
cout<<"\n
Record found";
}
}
bool
compare(const Record &r1,const Record &r2)
{
return
r1.item_code<r2.item_code;
}
void del(){
vector<Record>::iterator
i;
Record
o1;
cout<<"\n
Enter name of record to be delete: ";
cin>>o1.name;
i=find(r1.begin(),r1.end(),o1);
if(i==r1.end()){
cout<<"\n
Not found";
}
else{
r1.erase(i);
cout<<"\n
Deleted";
}
}
int main(){
int ch;
do{
cout<<"\n...MENU...";
cout<<"\n
1.INSERT";
cout<<"\n
2.DISPLAY";
cout<<"\n
3.SEARCH";
cout<<"\n
4.SORT";
cout<<"\n
5.DELETE";
cout<<"\n
6.EXIT";
cout<<"\n
ENTER YOUR CHOICE:- ";
cin>>ch;
switch(ch){
case
1: cout<<"\n Enter datails of item: ";
insert();
break;
case
2: cout<<"\n Display details of item: ";
display();
break;
case
3:
search();
break;
case
4:
sort(r1.begin(),r1.end(),compare);
cout<<"\n
Sorted order on roll number";
display();
break;
case
5:
del();
break;
case
6: cout<<"\n Wrong choice" ;
break;
}
}while(ch!=6);
return 0;
}
Output: 
Q7. Write a program in C++ to use map
associative container. The keys will be the names of states and the values will be the
populations of the states. When the program runs, the user is prompted to type
the name of a state. The program then looks in the map, using the state name as
an index and returns the population of the state.
Code:
#include<iostream>
#include<map>
#include<string>
using namespace std;
int main()
{
string
state;
float
population;
char
ans='y';
int
choice;
map<string,float>
m;
map<string,float>::iterator i;
do
{
cout<<"---MAIN MENU--"<<endl;
cout<<"\n1.INSERT STATE:-";
cout<<"\n2.DISPLAY";
cout<<"\n3.SEARCH STATE";
cout<<"\n4.DELETE"<<endl;
cout<<"ENTER YOUR CHOICE:- "<<endl;
cin>>choice;
switch(choice)
{
case
1:
cout<<"Enter
name of state:";
cin>>state;
cout<<"\n Enter the population(Cr):";
cin>>population;
m.insert(pair<string,float>(state, population));
break;
case
2:
cout<<"State and population are:"<<endl;
for(i=m.begin();i!=m.end();i++)
cout<<"["<<(*i).first<<","<<(*i).
second<<"]";
break;
cout<<"Enter state name for searching
population:"<<endl;
cin>>state;
if(m.count(state)!=0)
cout<<"\n Population
is"<<m.find(state)->second<<"Cr";
else
cout<<"The state is not present!"<<endl;
break;
case
4:
cout<<"Enter the state to be deleted:"<<endl;
cin>>state;
m.erase(state);
cout<<"The state is deleted"<<endl;
break;
}
cout<<"\n`Do you want to continue?(y/n)"<<endl;
cin>>ans;
}
while(ans=='y');
return 0;
}
Output:
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