std::vector::at

reference       at( size_type pos );

const_reference at( size_type pos ) const;

Returns a reference to the element at specified location pos, with bounds checking.

If pos not within the range of the container, an exception of type std::out_of_range is thrown.

Parameters

Return value

Reference to the requested element.

Exceptions

std::out_of_range if !(pos < size()).

Complexity

Constant.

See also