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  1. #include <stdio.h>
  2. int tri (int n){
  3. 	if (n==0){
  4. 		return 0;
  5. 	}else if (n==1){
  6. 	   return 0;
  7. 	}else if (n==2){
  8. 		return 1;
  9. 	}else {
  10. 		return tri(n-1)+tri(n-2)+tri(n-3);
  11. 	}
  12. }
  13.  
  14.  
  15.  
  16.  
  17. int main(void) {
  18. 	int n = 7;
  19.     printf("数列Tnについて, n=%dのときの値は%d\n", n, tri(n));
  20. 	return 0;
  21. }
  22.  
Success #stdin #stdout 0.01s 5316KB
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数列Tnについて, n=7のときの値は13
https://ideone.com/WFEl6U
language:
C (gcc 8.3)
created:
6 days ago
visibility:
public

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