Constructors ques 4

#include<iostream.h>
#include<conio.h>
class circle
{ int r;
float area;
public: circle(int radius)
{ r=radius;
area=3.14*r*r;
}
circle(circle &c1)
{ r=c1.r+1;
area=3.14*r*r;
}
void display()
{ cout<<"radius "<<r<<endl;
cout<<"area "<<area<<endl;
}
};
void main()
{ clrscr();
int r;
cout<<"enter radius";
cin>>r;
circle c1(r);
circle c2(c1);
cout<<"circle 1 \n";
c1.display();
cout<<"circle 2\n";
c2.display();
getch();
}

Constructors ques 3

#include<conio.h>
#include<iostream.h>
class fib
{ int first,sec,n;
 public:
fib()
{ first=0;
sec=1;
n=10;
}
fib(int a,int b,int c)
{ first=a;
sec=b;
n=c;
}
 void gen_fib();
 };
 void fib::gen_fib()
{ int a,b,c;
a=first;
b=sec;
cout<<a<<" "<<b<<" ";
for(int i=0;i<n-2;i++)
{ c=a+b;
a=b;
b=c;
cout<<c<<" ";
}
cout<<endl;
}
 void main()
 { clrscr();
int a,b,c;
fib a1;
cout<<"enter first sec and no. of terms";
cin>>a>>b>>c;
fib a2(a,b,c);
cout<<"default fibonacci series";
a1.gen_fib();
cout<<"user fibonacci series";
a2.gen_fib();
getch();
 }

Basic OOPS ques 6

#include<iostream.h>
#include<conio.h>
#include<stdio.h>
#include<string.h>
class country
{ int cntry_id;
char name[20],capital[20];
struct president
{ char lname[20],fname[20];
}pname;
long po;
 public:
void getdata()
{ cout<<"enter country id,name,capital,presidents name,population"<<endl;
cin>>cntry_id;
gets(name);
gets(capital);
gets(pname.fname);
gets(pname.lname);
cin>>po;
}
void showdata()
{ cout<<"country id  "<<cntry_id<<endl;
cout<<"name  "<<name<<"\t capital  "<<capital<<endl;
cout<<"presidents name  "<<pname.fname<<' '<<pname.lname<<endl;
cout<<"population  "<<po<<endl<<endl<<endl;
}
int pcheck(long a)
{ if(po>a)
return (1);
else return(0);
}
void search(char a[])
{ if(strcmp(name,a)==0)
showdata();
}
 };
int count(long pop,country c[5])
{ int no=0;
for(int i=0;i<5;i++)
no+= c[i].pcheck(pop);
return no;
}
void main()
{clrscr();
country c[5];
int no;
char a[20];
long p;
for(int i=0;i<5;i++)
c[i].getdata();
cout<<"enter search name"<<endl;
gets(a);
for(i=0;i<5;i++)
c[i].search(a);
cout<<"enter population to check";
cin>>p;
no=count(p,c);
cout<<"no. of countries with population greater then "<<p<<"is"<<no;
getch();
}

Basic OOPS ques 7

#include<iostream.h>
#include<conio.h>
class complexnum
{int real,imaginary;
public:
void readdata();
void display();
complexnum addcomplex(complexnum);
complexnum subcomplex(complexnum);
}c1,c2;
void complexnum::readdata()
{cout<<"enter real \timaginary";
cin>>real>>imaginary;
}
void complexnum::display()
{cout<<"real "<<real<<" imaginary "<<imaginary<<endl;
}
complexnum complexnum::addcomplex(complexnum c2)
{ complexnum c5;
c5.real=real+c2.real;
c5.imaginary=imaginary+c2.imaginary;
return c5;}
complexnum complexnum::subcomplex(complexnum c2)
{complexnum c4;
c4.real=real-c2.real;
c4.imaginary=imaginary-c2.imaginary;
return c4;
}
void main()
{clrscr();
c1.readdata();
c2.readdata();
c1.display();
c2.display();
complexnum c4,c5;
c5=c1.addcomplex(c2);
c4=c1.subcomplex(c2);
cout<<"c4=";
c4.display();
cout<<"c5=";
c5.display();
getch();
}

Basic OOPS ques 5

#include<stdio.h>

#include<iostrem.h>

#include<conio.h>

class floppy_box

{

public:

int fno, size;

char name[20];

public:

void getdata();

void showdata(int);

int findsize(char);

}

void floppy_box::getdata()

{

cin>>fno>>size;

gets(name);

}

void floppy_box::show(int num)

{

puts(size);

puts(name);

}

int floppy_box::findsize(char nm)

{

int i=0;

do

{

i++;

} while (nm[i]!='\0');

return i;

}

void main()

{

clrscr();

floppy_box f[5];

for(int i=0;i<5;i++)

l[i].getdata();

int ch;

switch(ch)

{

case 1 :

int fn;

cin>>fn;

for(int p-0;p<5;p++)

if (l[i].fno == fn)

{ l[i].showdata();

 break; }

break;

case 2:

int pos;

floppy_box t, sm;

for(i=0;i<4;i++)

{

sm-f[i];

pos-i;

fir(int j=i+1;j<5;j++)

{

if(sm.size<f[j].size)

sm=f[j];

j=pos;

t=f[i];

f[i]=f[pos];

f[pos]=t;

}

for(i=0;i<5;i++)

f[i].showdata();

break;

case 3:

int cnt=0;

char nm[20];

gets(nm);

for (i=0;i<5;i++)

if(nm==f[i].name)

cnt++l

break;

}

getch();