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  1. #include <stdio.h>
  2.  
  3. int fibo(int n)
  4. {
  5.   int n1 = 1;
  6.   int n2 = 1;
  7.   int n3;
  8.   int l;
  9.   int s;  
  10.   int i;
  11.  
  12.   for (i = 3; i < n; i++)
  13.   {
  14.     n3 = n1 + n2;
  15.     n1 = n2;
  16.     n2 = n3;
  17.   }
  18.  
  19.   if (n == 1)
  20.   {
  21.     l = n + 10 - 2;
  22.     s = 2;
  23.   }
  24.   else if (n == 2)
  25.   {
  26.     l = n + 10 - 1;
  27.     s = 1;
  28.   }
  29.   else
  30.   {
  31.     l = n + 10;
  32.     s = 0;
  33.   }
  34.  
  35.   for (i = n; i < l; i++)
  36.   {
  37.     n3 = n1 + n2;
  38.     n1 = n2;
  39.     n2 = n3;
  40.     s += n3;
  41.   }
  42.  
  43.   return s;
  44. }
  45.  
  46. int main()
  47. {
  48.   int i;
  49.   for (i = 1; i < 10; i++)
  50.   {
  51.     printf("%d\n", fibo(i));
  52.   }
  53.   return 0;
  54. }
  55.  
Success #stdin #stdout 0s 2248KB
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143
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374
605
979
1584
2563
4147
6710
https://ideone.com/iOViec
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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