do while: most elegant or efficient

From: Oyvind Sylta (oyvind.sylta_at_iku.sintef.no)
Date: 01/24/05 

Date: Mon, 24 Jan 2005 12:29:40 +0100

In CVF the following works fine, while in Intel Fortran (Windows) it does
not:

character c*5
max=5
a='bcdef'
n=1
do while(n.lt.max.and.c(n:n).ne.'a')
   n=n+1
enddo

I guess a correct way to write the while-loop would be:

do while(n.lt.max)
   if(c(n:n).ne.'a') n=n+1
enddo

However, what is the most efficient and elegant (?) way of writing this in
Fortran95? Is there a penalty in performance by splitting the while into a
while & if combination? What about other compilers?

Oyvind

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