29 мар. 2011 г. · You could use the 'at' function (someVector.at(somePosition) gets you the element at somePosition), or you could use someVector[somePosition]. It's like a more ...

19 сент. 2012 г. · The answer is in the question - "know what index the element is in.". So - for (int index = 0; index < aVector.size(); ++index) { // access using [] }

30 мая 2020 г. · You can output the first index element through this process. I have made a 2D vector and applied a for loop so each row of the vector's ...

19 февр. 2020 г. · No there is no such thing in C++11. If it is only a single index that needs a different initializer than all the others, I wouldn't use anything ...

8 мар. 2017 г. · It's bad style (or WRONG) to use reserve + index operator with no resize. The index operator is fast and doesn't have protection/safety. That's the only issue.

12 авг. 2018 г. · Vectors, like arrays, work only with integer indexes. For a vector vec, the index must be in range 0 <= index < vec.size() , otherwise it either does not ...

8 нояб. 2019 г. · The canonical way to have an index when iterating elements of a vector is to use a traditional index loop.

19 дек. 2019 г. · std::vector::size_type is an implementation defined unsigned integer type that is guaranteed to be able to index all elements in any vector.

25 авг. 2016 г. · Since vectors are organized sequentially, you can get an index by subtracting pointer to initial element from the pointer to element in ...

16 мая 2020 г. · I'm trying to reference a certain index within a vector but whenever I add new items to the vector the pointer isn't pointing towards the original value.