Find endianness

iview.cpp

#include <iostream>

using namespace std;

namespace {

	bool A = false;
	bool B = false;
	
	struct C {
		C() {
			union u {
				long l;
				char c[sizeof(long)];
			} u;
			u.l = 1;
			if (u.c[0] == 1) {
				B = true;
			}
			else {
				A = true;
			}
		}
	};

	C _c;

};




int main() {

	cout << "A: " << A << endl;
	cout << "B: " << B << endl;

	return 0;
}

// Output on my laptop is:
//  A: 0
//  B: 1