sort_antnum 是冒泡排序法，把长度为num的sort一维数组进行冒泡排序，从小排到大，例如sort【0】是最小的，同时记录一维数组sort_num记录序号，例如sort_num【0】中存放着最小的那个数的序号。-sort_antnum is a bubble sort method, the length is sort of a one-dimensional array of num bubble sort, from small discharged large, such as sort [0] is the smallest, while recording a one-dimensional array sort_num record number, for example sort_num [0] in the kept the smallest number that number.