error C2039:'rand' :is not a member of 'std'

error C2039:'rand' :is not a member of 'std' error C2039:'set' :is not a member of 'std' 是因为什么? ditorview.cpp(67) :error c2039:'inuse' :is not a member of ' is a member of is not a member of 'employee'什么意思 Which of the following is not a member function of the apstr A member of the family dying is a situation I would not like 在通过vs2010使用boost的date_time库时出现 error C2039:'nullptr_t' :is n You are not a member of the administrator grou you are not a member of the administrator group是什么意思 1.Is the writer a member of the Youth Club? He is a member of beijing Football club同义句