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  1. #include <stdio.h>
  2. //練習問題E
  3.  
  4. int trib(int n) {
  5.     if (n == 0) {
  6.         return 0;
  7.     }
  8.     else if (n == 1) {
  9.         return 0;
  10.     }
  11.     else if (n == 2) {
  12.         return 1;
  13.     }
  14.     else {
  15.         return trib(n - 1) + trib(n - 2) + trib(n - 3);
  16.     }
  17. }
  18.  
  19.  
  20.  
  21. int main(void) {
  22. 	int n = 7;
  23.     printf("数列Tnについて, n=%dのときの値は%d\n", n, trib(n));
  24. 	return 0;
  25. }
  26.  
Success #stdin #stdout 0s 5320KB
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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/owY31F
language:
C (gcc 8.3)
created:
10 days ago
visibility:
public

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