[Dev-C++] double in file no double

[Carlos d. M. <cg...@wo...>]

I have the variable double doubvar = 747675.57576;
fstream file;

file.open("archivo.txt", ios::out);
file << doubvar << endl;
file.close();

I read the file with notepad and the number lost the decimals!
And the same with cout << doubvar!
It does not happen with fprintf(file, "%lf", doubvar);

The same with long double, but with long double printf prints
-0.0000000.
????????.
_______________________________________________
|Notepad archivo.txt________________________      _ 0 X |
|747675
|
|
|
|_______________________________________________|

P.S. My Dev-C++ 4.01 (and 4.00) has the generate makefile option in the
project popup menu.