cctype only returns in value... what Im trying to do is that i will input a string lets say "123" then the program will say "it is an integer" then it will convert to integer... If I will input "1.44" then it will say "it is a float" then it will convert it to "float" (for arithmetic operation)
double IsFloat(std::string Buffer)
Stream >> TempFloat;
return 0.00000000000000000000000001 //i cant think of a better way to say it wasnt a float
then for the int just replace every instance of double with int, the [0-9]+\.[0-9]+ with [0-9]+ and return something other than 0.000...01
> i cant think of a better way to say it wasnt a float bool is_float(std::string)
your function may be better called `string_to_float'
in which in case of failure you could have returned 0, returned <0, returned `NaN', setting a global variable (errno), throwing an exception, returned a duple with a bool, or a boost optional
the functions in <cctype> work per character, so you'll have to write your parse function (which should take into account invalid constructions with valid characters)
However your reply seems to imply that it would be a trivial task like simply calling the `is_float()' function.
you forgot the minus sign in your regex
and scientific notation