一个有关文件如何读写的问题

Question

我在写程序的过程当中遇到过这样的问题：将数据格式1的数据读入程序并通过计算得出结果按格式2输出。
格式1：
1,0.0000,0.0000,0.000
2,0.0000,0.0000,0.000
.
.
.
.n,0.0000,0.0000,0.000
格式2：
1,0.000,0.000,0.000
2,0.000,0.000,0.000
.
.
.
.
n,0.000,0.000,0.000
这两种格式都是*.dat类型的。
请教高手我应该怎么做？

Answer 1

读文件的时候自己要把格式定义好。也就是自己要知道读取的是什么内容，哪一段是什么数据。至于把结果写入文件这就好办一些，把结果转换为字符串后，直接写入文件就可以了。