stl - Do I need to check capacity before adding an element to a vector in c++? -

i newbie c++ stl vectors sorry silly questions in advence. :) in program, have vector needs store unknown number of elements. have check if vector has achieved max_size before adding new element ? c++ compiler throw exception automatically when program tries add elements full vector ?

thank much, cassie

if std::vector has reached max size, attempting insert element result in underlying allocator throwing std::bad_alloc exception.

note, however, maximum size vector typically very, large (e.g., maximum value can represented size_t divided size of element type), unlikely, if not impossible, reach maximum size before run out of contiguous memory in vector can stored.