比如有个文本:aadsadsdasdsadasdasdsadasgvfbhgfjhhg...,
我想读取10个字符为一行,满行就下移一行,不够10个字符时就用空格填满,起结果为:
aadsadsdas
dsadasdasd
sadasgvfbh
gfjhhg    
请留下您的高论!谢谢!!!