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  1. #include <stdio.h>
  2.  
  3. int fibonacci(int n) {
  4.     if (n == 0) return 0;
  5.     if (n == 1) return 1;
  6.  
  7.     int a = 0, b = 1, fib;
  8.     for (int i = 2; i <= n; i++) {
  9.         fib = a + b;
  10.         a = b;
  11.         b = fib;
  12.     }
  13.     return fib;
  14. }
  15.  
  16. int main() {
  17.     printf("%d", fibonacci(5));  
  18.     return 0;
  19. }
  20.  
Success #stdin #stdout 0s 5324KB
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Standard input is empty
stdout
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5
https://ideone.com/ATb6iw
language:
C (gcc 8.3)
created:
8 days ago
visibility:
public

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