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#include <iostream>
using namespace std;
class P2 {
	protected:
		int x, y;
	public:
		P2(int _x=0, int _y=0): x(_x), y(_y) {};
		void Show() {
			cout << x * this->y << endl;
		}
};
class P2 : public P2 {
}
 
int main() {
	// your code goes here
	return 0;
}

prog.cpp:12:7: error: redefinition of ‘class P2’
 class P2 : public P2 {
       ^~
prog.cpp:3:7: error: previous definition of ‘class P2’
 class P2 {
       ^~
prog.cpp:12:1: error: new types may not be defined in a return type
 class P2 : public P2 {
 ^~~~~
prog.cpp:12:1: note: (perhaps a semicolon is missing after the definition of ‘<type error>’)
prog.cpp:15:10: error: two or more data types in declaration of ‘main’
 int main() {
          ^

Standard output is empty