I'm new at C and I have a little problem. I need to write a program where the user enters text and the program shows how long it is.

I tried with strlen(), but it's not what I want.

```
char a[20];
scanf("%s",a)

```

And if I type "Hello world" the result is 5, but I need 11.

I need to use scanf, but maybe it's impossible to do that with it...