std::unique_ptr::operator[]
From cppreference.com
< cpp | memory | unique ptr
| T& operator[](size_t i) const; |
(since C++11) | |
operator[] provides access to elements of an array managed by a unique_ptr.
The parameter i shall be less than the number of elements in the array; otherwise, the behavior is undefined.
Parameters
| i | - | the index of the element to be returned |
Return value
Returns the element at index i, i.e. get()[i].
Example
Run this code
#include <iostream> #include <memory> int main() { const int size = 10; std::unique_ptr<int[]> fact(new int[size]); for (int i = 0; i < size; ++i) { fact[i] = (i == 0) ? 1 : i * fact[i-1]; } for (int i = 0; i < size; ++i) { std::cout << i << ": " << fact[i] << '\n'; } }
Output:
0: 1 1: 1 2: 2 3: 6 4: 24 5: 120 6: 720 7: 5040 8: 40320 9: 362880
See also
| returns a pointer to the managed object (public member function) |