Programming in C++, 2nd Edition

474 Inheritance

11.13.2 Base and derived classes without constructors

In the absence of constructors in base and derived classes, the implicit constructors and destruc-

tors are executed when objects are declared. Consider the following program:

11.15 Write a program to derive a class. The base and derive classes should be without

constructors.

#include<iostream.h>

#include<conio.h>

class I

{

public:

int x;

};

class II : public I

{

int y;

public:

void set (int j, int k)

{

x=j;

y=k;

}

void show()

{

cout<<“x=”<<x <<“y=”<<y;

}

};

int main()

{

clrscr();

II i;

i.set(4,5);

i.show();

return 0;

}

OUTPUT

X = 4 y = 5

Explanation: In the above program, ...