Iterator auxiliary functions

Advance (iterator POs, int N );

Check whether the iterator exceeds end () and no return value.

 

Iterator_traits <inputiterator>: difference_type distance (pos1, pos2 );

Difference_type is used to define the distance.

 

Void iter_swap (pos1, pos2); // The iterator types are not necessarily the same, but the content of pos1 and pos2 can be assigned values to each other.

 

The iterator of vector is similar to a common pointer,

C ++ does not allow you to modify the temporary value of any basic type (including pointer.

Therefore, the temporary value cannot be changed in the function call parameters.