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  1. #include <stdio.h>
  2. int tri(int n){
  3.     if(n == 0) {
  4.     return 0;
  5.     }
  6.       else if(n == 1){
  7.         return 0;
  8.    }
  9.      else if(n == 2) {
  10.     	return 1;
  11.    }
  12.     return tri(n-1) + tri(n-2) + tri(n-3);
  13. }
  14.  
  15. int main(void) {
  16. 	int n = 7;
  17.     printf("数列Tnについて, n=%dのときの値は%d\n", n, tri(n));
  18. 	return 0;
  19. }
  20.  
Success #stdin #stdout 0s 5312KB
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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/dh84BM
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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