Is theres a simple way in c++ to increase the precision of a double that is even:
For instance
double d = 3.6
would be
d = 3.600 (adding 2 zeros)
this d is then sent to a string-class
std::to_string(d);
You may ask why? I am using a GUI (gtkmm) and in the textview every number produced has to have the same length.
This is the result if the length is not the same:
4.396 3.957 11
4.183 3.783 10
3.959 3.6 9
3.723 3.404 8
3.474 3.194 7
3.207 2.967 6
2.919 2.719 5
Is it possible to increase the decimals - that is adding extra zeros when the value is a primitive, or do I have to manipulate the string afterwards instead?
EDIT: I should have been more clear - I am not interested in std::cout . The output abow represent a GUI
Technically you are not changing the precision of the type double. To add "extra zeros" if the number is too short, you can use std::stringstream as follows:
std::stringstream s;
double d = 3.6;
s << std::fixed << std::setprecision(3) << d;
std::string res = s.str();
std::cout << res;
The above will set the digit precision to 3 digits and print 3.600.