vector类的使用介绍及模拟实现

Vector0. vector 的介绍Vectors are sequence containers representing arrays that can change in size.vector 是用数组实现的、可变长度的顺序容器。template < class T, //元素类型class Alloc = allocator<T> //空间配置器类型 >class vector; //类模板的声明从 vector 的声明可以看出，vect