Deciphering a tag character string

Applications Programming
1

I have a string, eg 7f30.3 and I want to store things in the following way

npos = 7
decform = true
width = 30
ndp = 3

I need to read each character one by one. I am coding in fortran but I can try to code it should answer be given in C in the above way.

2

how do you get 'true' from that?

3

I meant set decform = .true. if 'f' is encountered

I got something to work as follows:

isChar = .false. 
tag = "17f30.2" 
n = LEN_TRIM(tag) 
print '(A,A,A,I1)', 'tag = ', tag(:n), ', n = ', n 

j = 0 
do i = 1, n   
  if ( index('0123456789',tag(i:i)) > 0 ) then     
    j = j + 1   
  else
    exit
  endif
enddo 

print *, 'j = ', j 
npl = 0 
itmp = 0 
k = j 

do i = 1, j     
  read(tag(i:i),*) itmp     
  print *, tag(i:i)     
  npl = npl + (itmp * (10 ** (k-1)) )     
  k = k - 1 
enddo

print *, 'npl = ', npl 
print *, ' ' 

k = 0 
do i = j+2, n   
  if ( index('0123456789',tag(i:i)) > 0 ) then
    k = k + 1
  else
    exit
  endif 
enddo 

print *, 'k = ', k 
iwid = 0 
itmp = 0 

l = k 
print *, j+2, j+2+k-1 
do i = j+2, j+2+k-1     
  read(tag(i:i),*) itmp     
  print *, tag(i:i)     
  iwid = iwid + (itmp * (10 ** (l-1)) )     
  l = l - 1 
enddo 

print *, 'iwid = ', iwid