Include multiple header-files at once with only one #include-expression?

No, there is not.

Write an #include directive for each inclusion operation you wish to perform.

You could, however, have a "utility" header that does nothing but include many other headers that you use frequently. Then you just include that one utility header. Whether this is a good idea or not, is a matter of opinion.

If you go down that route, don't be tempted to start relying on internal implementation headers.

No, there is no way to do this. You have to type out (or copy) each #include to its own line, like this:

#include <stdio.h>
#include <stdlib.h>
#include <curses.h>
#include <string.h>

This applies to both C and C++.

Some of the other answers discuss creating another header file that includes each of these, but I'm not going to discuss doing that. It in general is a bad idea and causes issues like namespace pollution and the need to recompile when you change that header file.