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  1. #include <stdio.h>
  2. //練習問題E
  3. int tri(n){
  4. 	if(n==0){
  5. 		return 0;
  6. 	}
  7. 	else if(n==1){
  8. 		return 0;
  9. 	}
  10. 	else if(n==2){
  11. 		return 1;
  12. 	}
  13. 	return tri(n-1)+tri(n-2)+tri(n-3);
  14.  
  15. }
  16.  
  17.  
  18.  
  19. int main(void) {
  20. 	int n = 7;
  21.     printf("数列Tnについて, n=%dのときの値は%d\n", n, tri(n));
  22. 	return 0;
  23. }
  24.  
Success #stdin #stdout 0s 5292KB
comments (?)
stdin 
Standard input is empty
stdout 
数列Tnについて, n=7のときの値は13
https://ideone.com/vnbLOj
language:
C (gcc 8.3)
created:
19 days ago
visibility:
public

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