Distinguishing between purely numerical data and alphanumeric data

[Madhusudan Singh]

Hi

I have the following two lines in a data file :

VB= -5 to 5 in 1 step
1 -10 -5 3.896E-11 5E-14 -7.841E-11 0.557582 779.2

I need to tell them apart somehow. I tried :

all/any (isalpha(string)) % String read in via fgets()

Both return the same result (thanks to the presence of "E" characters in the 
line containing just numbers)

How do I disambiguate between the two ?

Thanks.



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