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  1. #include <stdio.h>
  2.  
  3. // トリボナッチ数列（if文で実装）
  4. int tri(int n){
  5.     if(n == 0){
  6.         return 0;
  7.     } else if(n == 1){
  8.         return 0;
  9.     } else if(n == 2){
  10.         return 1;
  11.     } else {
  12.         return tri(n - 1) + tri(n - 2) + tri(n - 3);
  13.     }
  14. }
  15.  
  16. int main(void) {
  17.     int n = 7;
  18.     printf("数列Tnについて, n=%dのときの値は%d\n", n, tri(n));
  19.     return 0;
  20. }
Success #stdin #stdout 0.01s 5288KB
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Standard input is empty
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数列Tnについて, n=7のときの値は13
https://ideone.com/ImiAB1
language:
C (gcc 8.3)
created:
19 days ago
visibility:
public

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