输入一组数字，获取随机抽取的数目，循环依次抽出相应的数字。例如：输入1,2,3,4,5,6,7循环抽取第三个数，数组变成为3,6,2,5,7,4,1-Enter a group of figures, the number of random access, loop to loop out the corresponding number. For example: taking the third cycle the number of input 1,2,3,4,5,6,7, 3,6,2,5,7,4,1 turned into an array