CodePudding user response:
Three questions, you can try on the PC, n & gt; 2 execution, so the func (3) or f (2) + f (1) performs the else, 2 + 2, the last is 4.4, due to the C function cannot define functions, C function storage type can be static or external one, when defined function do not specify a storage type is static, it is external storage type (extern), namely function allows other function calls by the program, so the answer is extern; (online down down, can yourself to check first)
9 items, own can have a try,