std::move_backward in C++
Moves the elements in the range [first,last] starting from the end into the range terminating at result.
The function begins by moving *(last-1) into *(result-1), and then follows backward by the elements preceding these, until first is reached (and including it).
BidirectionalIterator2 move_backward (BidirectionalIterator1 first, BidirectionalIterator1 last, BidirectionalIterator2 result); result Bidirectional iterator to the past-the-end position in the destination sequence. This shall not point to any element in the range [first,last]. Return Type : An iterator to the first element of the destination sequence where elements have been moved.
Input : vec1 contains : 3 4 5 7 8 vec2 contains : 8 9 6 2 4 7 Output : arr2 contains : 8 9 6 5 7 8 /*3 elements from 3rd position of vector vec1 moved to starting 4th position of vec2*/
Vector1 contains : 1 2 3 4 5 Vector2 contains : 7 7 7 7 7 Vector1 contains after std::move_backward function: 7 7 7 4 5
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