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  1. #include <stdio.h>
  2. int fib( int n ){
  3.     if (n <= 0) return 0;
  4.     if (n == 1) return 1;
  5.  
  6.     int a = 0;      
  7.     int b = 1;      
  8.     int result = 0;
  9.     for (int i = 2; i <= n; i++) {
  10.         result = a + b; 
  11.         a = b;          
  12.         b = result;     
  13.     }
  14.  
  15.     return result;
  16. }
  17. int main(void) {
  18. int n;
  19. scanf("%d", &n);
  20. printf("fib(%d)=%d\n", n, fib(n));
  21. return 0;
  22. }
  23.  
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
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4
stdout
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fib(4)=3
https://ideone.com/5jgWzd
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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