#include <cfloat>
#include <cmath>
#include <iostream>
using namespace std;
 
auto classify(double x) {
    switch (std::fpclassify(x)) {
        case FP_INFINITE: return "Inf";
        case FP_NAN: return "NaN";
        case FP_NORMAL: return "normal";
        case FP_SUBNORMAL: return "subnormal";
        case FP_ZERO: return "zero";
        default: return "unknown";
    }
}
 
int main() {
	double x = DBL_MIN;
	cout << "DBL_MIN is " << classify(x) << endl;
	cout << (x > 0) << endl;
	cout << "DBL_MIN * DBL_MIN is " << classify(x * x) << endl;
	cout << (x * x > 0) << endl;
	return 0;
}

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