单链表是线性表的一种链式存储，属于线性结构，是通过指针来实现链式存储的，比之以顺序表，其存储密度更低，但是在插入， 删除操作上，其效率比顺序表要高-Single-chain is a chain store linear form, are linear structure is realized by the chain pointer stored in the order form, which is lower than the storage density, but in the