该程序实现显示一个数字的方阵，程序中的清屏功能可将上次运行的结果

清除，重新显示下次运行结果。本程序在dos中或windows98中运行。-The program displays a number of the square, the program' s clear screen function may be the result of the last run clear, re-display the next run results. The program is run in dos or windows98.