The usage of the C ++ de-duplicated function unique () is explained. The function unique

The usage of the C ++ de-duplicated function unique () is explained. The function unique

Unique () [deduplicated function]

Unique () is a function in the C ++ standard library function. Its function is to remove adjacent duplicate elements (only one retained). Therefore, you need to sort the array before use.

The preceding example shows how to use the function. For arrays a, unique (a, a + n)-a whose length is n, the return value is the length of the de-duplicated array.

So how does it implement de-duplication? Delete?

No, it does not delete repeated elements, but stores repeated elements at the end of the array.