Answer Posted / jyoti bajaj

virtual keyword can be used with base classes as well as
with functions.Here we are talking about virtual base
classes.
class A
{
public:
A(){cout<<"it is class A"<<endl;}
};
class B:public A
{
public:
B(){cout<<"it is class B"<<endl;}
};
class C:public A
{
public:
C(){cout<<"it is class C"<<endl;}
};
class D:public B,public C
{
public:
D(){}
};
void main()
{
D obj;
}
output:
it is class A
it is class B
it is class A
it is class C

since class A is constructed twice.but if we want that only
one copy of class A should be shared by both classes A &
B.so we inherit the base class by using virtual keyword.

class A
{
public:
A(){cout<<"it is class A"<<endl;}
};
class B:virtual public A
{
public:
B(){cout<<"it is class B"<<endl;}
};
class C:virtual public A
{
public:
C(){cout<<"it is class C"<<endl;}
};
class D:public B,public C
{
public:
D(){}
};
void main()
{
D obj;
}
output:
it is class A
it is class B
it is class C

What are the 3 principles of oop?

1117

---

How to hide the base class functionality in Inheritance?

1139

---

What is oops with example?

1049

---

can inline function declare in private part of class?

4408

---

Following are the class specifications: class {int a}; class {int b}; Using friend funtion,calculate the max of two objects and display it.

2462

---

This program numbers the lines found in a text file. Write a program that reads text from a file and outputs each line preceded by a line number. Print the line number right-adjusted in a field of 3 spaces. Follow the line number with a colon, then one space, then the text of the line. You should get a character at a time and write code to ignore leading blanks on each line. You may assume that the lines are short enough to fit within a line on the screen. Otherwise, allow default printer or screen output behavior if the line is too long (i.e., wrap or truncate). A somewhat harder version determines the number of spaces needed in the field for the line numbers by counting lines before processing the lines of the file. This version of the program should insert a new line after the last complete word that will fit within a 72-character line.

2124

---

Can we define a class within the interface?

1042

---

How can you overcome the diamond problem in inheritance?

1184

---

There are two base class B1,B2 and there is one class D which is derived from both classes, Explain the flow of calling constructors and destructors when an object of derived class is instantiated.

1997

---

What is a class and object?

1055

---

write a programe to calculate the simple intrest and compund intrest using by function overlading

2205

---

explain sub-type and sub class? atleast u have differ it into 4 points?

2317

---

What is oops?what is its use in software engineering?

1032

---

What is pointer in oop?

1053

---

What are different oops concepts?

1061

---