std :: remove实际上不会从容器中擦除元素，但它会返回新的结束迭代器，它可以传递给container_type :: erase来删除现在位于容器末尾的额外元素：

std::remove doesn't actually erase the element from the container, but it does return the new end iterator which can be passed to container_type::erase to do the REAL removal of the extra elements that are now at the end of the container:

std::vector<int> vec;
// .. put in some values ..
int int_to_remove = n;
vec.erase(std::remove(vec.begin(), vec.end(), int_to_remove), vec.end());