Why my program for fibonicci series is giving error?

Question

https://code.sololearn.com/c74H9XpNjHRv/?ref=app

Answer 1

It was because the compiler could not decide whether it will be initialized.

If there is a possibility that initialization will not be performed by a branch such as if statement, a compile error occurs.

Answer 2

Because you haven't initialised (a) and( b) . Do this
int a=0,b=0,c;

Dont know about Fibonacci series but whats happening here is that the input goes to last else where it says c=a+b since you never put any value to a and b , so it shows error .
It should be initialised differently for Fibonacci but thats what is causing the error .

Answer 3

But in for loop, if(i==0) needs to be executed first, that initialise the value of a.

Answer 4

It means i have to initialise a and b at the time of declaration i.e int a=0,b=1. Hm, i got it. Thanks all.