C++ bounded floats

bounded_floats.cpp

#include <iostream>
#include <cmath>
#include <cassert>

#define DEBUG_BOUNDS 1 // 1 enabled, 0 disabled.

class BoundedFloat {
    private:
    float _value;
    
    public:
    BoundedFloat(const float low, const float high, const float value):
        _value(value){
            assert(low <= value && value <= high);
    }
    
    operator float() {
        return _value;
    }
};

#if DEBUG_BOUNDS
    #define HitPoint(value) BoundedFloat(0.0, 100.0, value)
    #define Damage(value) BoundedFloat(0.0, INFINITY, value)
#else
    #define HitPoint(value) float(value)
    #define Damage(value) float(value)
#endif

int main() {
    // Write C++ code here

    auto hit_points = HitPoint(100.0);
    auto damage = Damage(20.0);
    
    for (int i = 0; i < 6; i++) {
        std::cout << float(hit_points) << "\n";
        hit_points = HitPoint(hit_points - damage);
    }

    return 0;
}