按钮"第一题"：计算数组的对角线数据和

按钮"第二题"：找出最大数以及所在的行下标和列下标

按钮"第三题"：求每行的平均值、并把二维数组按行平均值重新排列

按钮"第四题"：将排序后的二维数组进行转置-Button "first question": an array of data and calculating the diagonal

Button "second question": find out the maximum number of rows and columns where the subscr ipt and subscr ipt

Button "third question": averaged per line, and the two-dimensional array by rows mean rearranging

Button "Fourth Question": the two-dimensional array sorted transpose