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DJMaze · 03-18-2005, 11:53 AM

strtod() converts a string to a double or long double value and can handle numbers like
+ 1231.1981 e-1
502.85E2
+ 2010.952
strtod stops reading the string at the first character that cannot be interpreted as an appropriate part of a double value.

Your pEnd must be '\0' else it could still fail.
The (pString != pEnd) is also TRUE on values like "502.85E2 not number"

atoi()
Is another way to check numberic values but then only with integers.

03-18-2005, 11:53 AM	#2 (permalink)
DJMaze Senior Contributor Join Date: Mar 2005 Posts: 757	strtod() converts a string to a double or long double value and can handle numbers like + 1231.1981 e-1 502.85E2 + 2010.952 strtod stops reading the string at the first character that cannot be interpreted as an appropriate part of a double value. Your pEnd must be '\0' else it could still fail. The (pString != pEnd) is also TRUE on values like "502.85E2 not number" atoi() Is another way to check numberic values but then only with integers.