From: Pavel Vainerman <pv@etersoft.ru> To: ALT Linux Community general discussions <community@lists.altlinux.org> Subject: [Comm] Ошибка (или нет?) в std::partition Date: Fri, 25 Aug 2017 01:13:08 +0300 Message-ID: <101a26f1-1b29-ca8d-c1f3-d86b8797ef91@etersoft.ru> (raw) Добрый день. Обнаружил тут странное поведение у std::partition(). Вот тестовый код (c++11). #include <iostream> #include <vector> #include <iomanip> #include <algorithm> using namespace std; void print( vector<int>& v ) { for( const auto& i: v ) cout << setw(3) << i; cout << endl; } int main() { vector<int> v = { -10, 0, -4, 5, -2 , 0, 3, 1, 7, 8, 9 }; print(v); std::partition(v.begin(),v.end(),[](int v){ return v<0; }); print(v); return 0; } Вот результат (первая строка, исходный вектор, вторая преобразованный, опорный элемент 0). -10 0 -4 5 -2 0 3 1 7 8 9 -10 -2 -4 5 0 0 3 1 7 8 9 Так вот смущает меня почему "5" не правее нулей? Может ли кто-нибудь пояснить, почему так? -- Pavel Vainerman www.etersoft.ru
next reply other threads:[~2017-08-24 22:13 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-08-24 22:13 Pavel Vainerman [this message] 2017-08-24 22:40 ` Alexey Borisenkov 2017-08-25 7:52 ` Pavel Vainerman
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