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  1. #include <stdio.h>
  2. //練習問題E
  3. int tri(int 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. 	else{
  14. 		return tri(N-1)+tri(N-2)+tri(N-3);
  15. 	}
  16. }
  17.  
  18. int main(void) {
  19. 	int n = 7;
  20.     printf("数列Tnについて, n=%dのときの値は%d\n", n, tri(n));
  21. 	return 0;
  22. }
Success #stdin #stdout 0.01s 5312KB
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数列Tnについて, n=7のときの値は13
https://ideone.com/RjMVsD
プロ演II　第6回演習E
language:
C (gcc 8.3)
created:
14 days ago
visibility:
public

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