自己实现的vector类，实现了capacity，reserve，push_back，pop_back，size，clear及erase函数；隐性调用了swap（调用reserve时调用swap），empty（选择功能4和6时调用empty）。简易控制台测试程序。对初学者很有帮助。-Own implementation of the vector class, capacity, reserve, the push_back, The pop_back, size, clear and erase function　implicit call to swap (swap) call to reserve call empty (selection 4 and 6:00 call to empty). Simple console test program. Useful for beginners.