c语言Recamán's Sequence

怎么用c语言Recamán's Sequence

Implement this in a program. Write two functions, one for solving it iteratively, one for solving it recursively.

Take two arguments from the command-line: an "i" or "r", and the term number (how many terms to print).

Print out which method executed (was selected) and all the terms (and the number of terms).

• 可以看下c语言参考手册中的 c语言-gets_s()

这个是什么问题啊