RE: Help please with a small code conversion

meek_at_skyway.usask.ca
Date: 10/19/04 

Date: 19 OCT 04 15:43:40 GMT

In a previous article, jspaldin@umflint.edu (Jason) wrote:
>I am trying to convert a piece of FORTRAN code to C++.
>
>write(ifile,*) h(i,j)
>
>Does this simply write to a file a entry from a Ith by Jth entry of a
>matrix? If so what does (ifile, *) do? Does this make the entry
>added to a file called (ifile)?
>
>Also there is another line that has me stuck
>
>implicit double precision(a-h,o-z)
>
>I am not sure the significance of implicit. How could I get the same
>effect using c++?
>
>
>Jason Spalding
  implicit ... means that all variable names starting with
these letters (a,b,c,...,h and o,p,q,...,z) are typed
as double precision (8byte) floating
  This includes function names.
  Since (in F77 and earlier) integer vs real was determined
this way (i.e. i-n=integer, a-h,o-z=real) unless typed
explicitly, then provided this naming scheme was followed
in the program, it was easy to change to DP to choose
speed vs. accuracy. These days
co-processer is probably doing DP no matter what you choose
Chris