直接插入排序 排序过程：整个排序过程为n

代码说明：

直接插入排序 排序过程：整个排序过程为n-1趟插入，即先将序列中第1个记录看成是一个有序子序列，然后从第2个记录开始，逐个进行插入，直至整个序列有序-Direct Insertion Sort to sort the process: the whole process of sorting times for the n-1 insert, that is, first sequence of the first one recorded as an orderly sequence, and then from the first two records began to insert one by one until the entire sequence has Preface