Where does the abstract class is used?
Pick out the correct option.
What is meant by pure virtual function?
What is the output of this program?
1.
#include
2.
using namespace std;
3.
class Base
4.
{
5.
public:
6.
virtual void print() const = 0;
7.
};
8.
class DerivedOne : virtual public Base
9.
{
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public:
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void print() const
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{
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cout << "1";
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}
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};
16.
class DerivedTwo : virtual public Base
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{
18.
public:
19.
void print() const
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{
21.
cout << "2";
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}
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};
24.
class Multiple : public DerivedOne, DerivedTwo
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{
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public:
27.
void print() const
29.
{
29.
DerivedTwo::print();
30.
}
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};
32.
int main()
33.
{
34.
Multiple both;
35.
DerivedOne one;
36.
DerivedTwo two;
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Base *array[ 3 ];
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array[ 0 ] = &both;
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array[ 1 ] = &one;
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array[ 2 ] = &two;
41.
for ( int i = 0; i < 3; i++ )
42.
array[ i ] -> print();
43.
return 0;
44.
}
What is the output of this program?
1.
#include
2.
using namespace std;
3.
class sample
4.
{
5.
public:
6.
virtual void example() = 0;
7.
};
8.
class Ex1:public sample
9.
{
10.
public:
11.
void example()
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{
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cout << "ubuntu";
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}
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};
16.
class Ex2:public sample
17.
{
18.
public:
19.
void example()
20.
{
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cout << " is awesome";
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}
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};
24.
int main()
25.
{
26.
sample* arra[2];
27.
Ex1 e1;
28.
Ex2 e2;
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arra[0]=&e1;
30.
arra[1]=&e2;
31.
arra[0]->example();
32.
arra[1]->example();
33.
}