М
МишаDec. 15, 2017, 6:17 a.m.

Как найти в QVector макс и мин

QVector

Здравствуйте.

Как у QVector найти макс и мин между нужными элементами? Между началом и концом вектора работает так:
double q1=*std::max_element(High.begin(),High.end());
А если хочу найти между не конечными элементами :
double q1=*std::max_element(High[0],High[10]);
то выдает 3 ошибки:
C:\Qt\project\StrategyCod\strategycod.cpp:78: ошибка: invalid type argument of unary '*' (have 'double')
double q1=*std::max_element(High[0],High[10]);
^
C:\Qt\Qt5.9.2\Tools\mingw530_32\i686-w64-mingw32\include\c++\bits\predefined_ops.h:43: ошибка: invalid type argument of unary '*' (have 'double')
{ return *__it1 < *__it2; }
^
C:\Qt\Qt5.9.2\Tools\mingw530_32\i686-w64-mingw32\include\c++\bits\predefined_ops.h:43: ошибка: invalid type argument of unary '*' (have 'double')
{ return *__it1 < *__it2; }
^

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2
Evgenii Legotckoi
  • Dec. 15, 2017, 6:24 a.m.
  • The answer was marked as a solution.

День добрый!

В данном случае std::max_element работает с итераторами, поэтому обращение через оператор [] не сработает. Но в данном случае можно записать так.
double q1=*std::max_element(High.begin() + 0 , High.begin() + 10);
Это будет эквивалентно тому, что вы попытались сделать с оператором [], только применительно к итераторам.
    М
    • Dec. 15, 2017, 6:26 a.m.

    Спасибо

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