Slip20
Q.1) 1 Write a C++ program to calculate
maximum of two integer numbers of two different classes using friend function.
#include<iostream.h>
#include<conio.h>
class abc;
class xyz
{
int x;
public:
void setvalue(int i)
{
x=i;
}
friend void max(xyz, abc);
};
class abc
{
int a;
public:
void setvalue(int i)
{
a=i;
}
friend void max(xyz, abc);
};
void max(xyz m, abc n)
{
if(m.x>n.a)
cout<<m.x;
else
cout<<n.a;
}
void main()
{
abc ab;
ab.setvalue(4);
xyz xy;
xy.setvalue(14);
clrscr();
max(xy, ab);
getch();
}
Q.2) Write a C++ program to create a
class Department which contains data members as Dept_Id, Dept_Name, H.O.D.,
Number_Of_staff. Write necessary member functions to
i. Accept details from user for ‘n’
departments and write it in a file “Dept.txt”.
ii. Display details of
department from a file.
i.
Count the
number of objects stored in a file.
#include<iostream.h>
#include<conio.h>
#include<fstream.h>
class dept
{
int did;
char dname[20];
char hod[15];
int nos;
public:
void accept()
{
cout<<"Enter the
department id-";
cin>>did;
cout<<"\nEnter the
department name-";
cin>>dname;
cout<<"\nEnter the
hod-";
cin>>hod;
cout<<"\nEnter the no.
of staff-";
cin>>nos;
}
void display()
{
cout<<"\nThe department is- "<<did;
cout<<"\n The
department name is- "<<dname;
cout<<"\nThe Head of
department is- "<<hod;
cout<<"\nThe number of
staff is- "<<nos;
}
};
void main()
{
dept d[5];
int n,i;
clrscr();
fstream file;
file.open("dept.txt",
ios::in|ios::out);
cout<<"\nEnter the no.
of records you want to enter-";
cin>>n;
for(i=0; i<n; i++)
{
d[i].accept();
file.write((char*) & d[i],
sizeof(d[i]));
}
cout<<"\nDetails of
department from the file-: ";
for(i=0; i<n; i++)
{
file.read((char*) &d[i],sizeof(d[i]));
d[i].display();
}
file.close();
getch();
}
