single inheritance

// single inheritance
# include "iostream.h"
class XY
{
int p;


public:
int q;
void get_pq();
int get_p(void);
void show_p(void);
};
class EF: public XY
{
int r;
public:
void mul(void);
void display (void);
};
void XY::get_pq(void)
{"enter values for p and q";
};
int XY::get_p()
{
return p;
};
void XY::show_p()
{
cout<<"p="<};
void EF::mul()
{
r= q * get_p();
};
void EF::display()
{
show_p();
cout<<"q= " << q<<"\n";
cout<<"r= " << r<<"\n\n";
};

void main()
{

EF ef;
ef.mul();
ef.display();
ef.show_p();
ef.display();

ef.q=10;
ef.mul();
ef.display();

ef.q=5;
ef.mul();
ef.display();
};