Question

write a program in c++ that would accept a number and write it in fibonacci sequence

Answer 1

I will help you with the logic of Fibonacci series.
0,1,1,2,3,5,8,13....
so F(n)=F(n-1)+F(n-2)
You can use different methods to code this (simple for loop with two temp variable can do the trick, recursion, memorization)

Answer 2

Exactly
0 + 1 = 1,
1 + 1 = 2,
1 + 2 = 3,
2 + 3 = 5,
3 + 5 = 8,
5 + 8 = 13,
8 + 13 = 21,
and so on.

notice the pattern?