Originally posted by ftp0000 at 2010-03-26 12:25:45:


这样也挺复杂的，建议lz还是用do while来做吧

Originally posted by tjyl at 2010-03-27 11:20:24:
N=10000;
i=2
step=1
do while (i    do sth....
   step=i**2
   i =i+step
end do
.....

Originally posted by holmescn at 2010-03-27 16:33:00:



do i=1,10000
j=1/6 i (1 + i) (1 + 2 i)
do sth. with j
end do

我是这意思。哦，我忘了有的前N项和是不能求的。还是tjyl的方法好。我忽略了求和的问题了。

Originally posted by tjyl at 2010-03-28 22:09:32:
主要是大家用Fortran时间长了，用do上瘾了就忘记了while循环。。