Return the complete number

[drug]

24.07.2019 18:45, Greatsam4sure пишет:
> int main(){
>   double mum = 0;
>   Write("enter a number: ")
>   readf(" %s\n",&num);
>   Writeln(num);
> 
> }
> 
> How do I return the complete number the user enter since I don't since 
> the user can enter numbers of various length with dmd approximating it.
> 
> I will appreciate any help

does it help?

writefln("%.8f", num); // for float

writefln("%.16f", num); // for double