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stupid question about ascii characters

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# 1  
Old 09-28-2004
stupid question about ascii characters
i know it's out there, but I cannot remember how to check if a given ascii character string contains all digits or not ... any ideas?

ie...function("123") --> OK
function("NOT_A_NUMBER") --> returns error

thanks!!
# 2  
Old 09-28-2004
isdigit will test a single character. I guess you could try strtol on the string and see what happens. Or maybe strspn() with a second string of "0123456789"? I don't think there is a function that does precisely what you want. Of course, it would be a snap to write one.
# 3  
Old 09-28-2004
i think isdigit() was the function I was trying to remember (though it doesn't work completely the way I described)

thanks!!
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