#include <algorithm>
#include <cassert>
#include <set>
struct Coordinat
{
explicit Coordinat(const double x = 0.0,const double y = 0.0)
: m_x{x}, m_y{y}
{
}
double GetX() const noexcept { return m_x; }
double GetY() const noexcept { return m_y; }
private:
const double m_x;
const double m_y;
};
bool operator<(const Coordinat& lhs, const Coordinat& rhs)
{
if (lhs.GetX() < rhs.GetX()) return true;
if (lhs.GetX() > rhs.GetX()) return false;
return lhs.GetY() < rhs.GetY();
}
int main()
{
std::set<Coordinat> s;
s.insert(s.begin(),Coordinat( 2.0,-5.0));
s.insert(s.begin(),Coordinat(-1.0,-1.0));
s.insert(s.begin(),Coordinat( 0.0, 8.0));
s.insert(s.begin(),Coordinat(-2.0,-4.0));
s.insert(s.begin(),Coordinat( 1.0,-1.0));
const auto xs {
std::minmax_element(s.begin(),s.end(),
[](const Coordinat& lhs, const Coordinat& rhs)
{
return lhs.GetX() < rhs.GetX();
}
)
};
const double minx = (std::get<0>(xs)).GetX();
const double maxx = (*xs.second).GetX();
assert(minx == -2.0);
assert(maxx == 2.0);
const auto ys {
std::minmax_element(s.begin(),s.end(),
[](const Coordinat& lhs, const Coordinat& rhs)
{
return lhs.GetY() < rhs.GetY();
}
)
};
const double miny = (*ys.first).GetY();
const double maxy = (*ys.second).GetY();
assert(miny == -5.0);
assert(maxy == 8.0);
}
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