print()
txt = input("请输入你要显示的文本：")
screen_width=100
txt_width = len(txt) + 6
box_width = 3
left_margin = (screen_width - txt_width ) //2
print()
print(' ' * left_margin + '+' + '-' * (txt_width) + '+')
print(' ' * left_margin +'|' + ' ' * (txt_width) + '|')
print(' ' * left_margin +'|' + ' ' * (box_width) + txt + ' ' * (box_width) + '|')
print(' ' * left_margin +'|' + ' ' * (txt_width) + '|')
print(' ' * left_margin +'+' + '-' * (txt_width) + '+')
print()
input("输入Enter键结束此程序")
