Is it bad practice to use C features in C++?

Question

For example printf instead of cout, scanf instead of cin, using #define macros, etc?

Answer 1

I'd just post a comment to another reply, but since I can't... C's printf() is better than C++'s iostream because of internationalization. Want to translate a string and put the embedded number in a different place? Can't do it with an ostream. printf()'s format specification is a whole little language unto itself, interpreted at runtime.