a question

This was asked to me in an interview. I am wondering how many of you know this

What is the type of the addition of an unsigned and a signed integer in C?

>>13
Array of function pointers in C.. Do you need to have at least the parameters properly typed? I mean, if you want different kind of functions, you can't throw a "int (*f)()" to a "int (*f)(int)" can you? But maybe you can throw the return type?