simple namespace examples

Bjarne Stroustrup “Programming Principles and Practice Using C++”
Chapter 8 Drill 3
Using std_lib_facilities.h by Bjarne Stroustrup.

main.cpp main file

//	Philipp Siedler
//	Bjarne Stroustrup's PP
//	Chapter 8 Drill 3

#include "std_lib_facilities.h"

namespace X {
	int var;
	void print() {
		cout << var << "\n";
	}
}

namespace Y {
	int var;
	void print() {
		cout << var << "\n";
	}
}

namespace Z {
	int var;
	void print() {
		cout << var << "\n";
	}
}

int main() {
	X::var = 7;
	X::print(); //print X's var
	using namespace Y;
	var = 9;
	print(); //print Y's var
	{	using Z::var;
		using Z::print;
		var = 11;
		print(); //print Z's var
	}
	print(); //print X's var
	X::print(); //print Y's var

	keep_window_open();
}

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