Help with Functions

Question

Can someone tell me why my Fibonacci Sequence code does not work as I have written it. It seems logical to me that it should work

https://code.sololearn.com/czjQq6VsK8TW/#cpp

Answer 1

Check out the lessons on loops in the C++ course here...

Answer 2

If you want to do it with recursion instead of loops, you have to make this function return something.
Hint:
If x == 0 or x==1 it should return 1
else it should return itself(x-1)/itself(x-2)

Answer 3

#include <iostream>
using namespace std;

//Fibonacci Sequence

int fuxn(unsigned int x){

return (x<2)?x:(fuxn(x-1)+fuxn(x-2));
}
int main() {
cout<< fuxn(10);
return 0;
}

Answer 4

One is the assignment operator, one is the equality operator.

= is the assignment operator. b = 1 will set the variable b equal to the value 1.

== is the equality operator. it returns true if the left side is equal to the right side, and returns false if they are not equal

With only rare exceptions, you should not be using the assignment operator inside an if clause, but that is an extremely common beginner mistake.

Answer 5

Your original never worked because it didn't make sense. I highly suggest reviewing functions in the course supplied here.

Answer 6

thanks I've reviewed functions twice. it makes sense to me this stuff is confusing

Answer 7

(X <2)?×: (fuxn(x-1) + fuxn(x-2)); It is equal to a sentence if if x <2 returns x or sea 1 or 0 otherwise it calls a fuxn (x-1) + fuxn (× -2) or sea something similar to what you did

Answer 8

Unsigned int ensures that the function parameter is the set of positive integers including zero

Answer 9

Put double == between numbers it's complaining about. That should at least fix the errors!

Answer 10

So I tried == and it didn't work. Also I did the courses on the loops. I don't see why I need a loop here. It should automatically loop into itself since it needs to solve fuxn(9) and fuxn(8) ect

Answer 11

This works, but I don't understand why my original doesn't.

https://code.sololearn.com/c5Q3yZksW5Tb/#cpp

Answer 12

Also can someone help me understand when to use = vs when to use ==