编制一维数组排序程序。数组大小n用全局变量定义，数组数据从文本文件中读入或随机生成。包含冒泡排序、选择排序、插入排序三种排序方法。程序能够选择使用任何一种方法排序。-The preparation of one-dimensional array sorting program. Array size n with the global variable definition, an array of data read from a text file or randomly generated. Include bubble sort, selection sort, insertion sort three kinds of sorting method. Program can choose to use either method to sort.