length of decimal expansion

[vix290788]

How do I go about writing a code to determine how many digits are in a decimal expansion of any given number?
I have entered the
cin >> N;
so that the user enters any number, but how do I calculate the number of digits they enter?

[curiously enough]

If you want the number of digits AFTER the decimal there are countless ways to find them. This a random one I thought up:

Spoonfeeding code removed

If you want the number of digits BEFORE the decimal there are even more ways, like:

Spoonfeeding code removed

The integer i represents in both cases the number of digits.

[donbock]

You could input a string and later convert the string into a number. It should be straightforward to convert a string into a number. Finding the length of a string is trivial.

Don't count leading and trailing whitespace as decimal digits.
Don't count the decimal point as a decimal digit.