Question

How to use base class and derived class with pointers in C++

Answer 1

#include <iostream>

using std::cout;
using std::endl;

class Base {
	char name[30];
public:
	void set_name(char *s) {
		strcpy(name, s);
	}
	void print_name() {
		cout << name << endl;
	}
};

class DerivedClass : public Base {
	char language[20];
public:
	void set_language(char *s) {
		strcpy(language, s);
	}
	void print_language() {
		cout << language << endl;
	}
};

int main()
{
	Base *p;
	Base bobj;

	p = &bobj;
	p->set_name("Cora");
	bobj.print_name();
	
	DerivedClass *dp;
	DerivedClass dobj;

	p = &dobj;
	p->set_name("Emmett");
	p->print_name();
	
	dobj.print_name();

	dp = &dobj;
	dp->set_language("C++");
	dp->print_language();

	return 0;
}

/*
run:

Cora
Emmett
Emmett
C++

*/

 

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