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How to make 2d c-style arrays with unique_ptr?

To create a simple array i'd do!! std::unique_ptr<int[]> arr(new int[100]); How can i create a 100*100 2d array using a unique ptr??

16th Feb 2019, 9:53 AM
Mensch
Mensch - avatar
1 ответ
+ 3
Like you would do with classic heap arrays: int ** a = new int*[100]; for (int i = 0; i < 100; i++) { a[i] = new int[100]; } the unique_ptr just acts like your regular old pointer (just with fancy syntax) std::unique_ptr<std::unique_ptr<int[]>[]> arr(new std::unique_ptr<int[]>[100]); for (int i = 0; i < 100; i++) { arr[i] = std::unique_ptr<int[]>(new int[100]); } Follow up question: why tho?
21st Feb 2019, 11:52 PM
Greg Hanston
Greg Hanston - avatar