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  1. #include <stdio.h>
  2. //練習問題E
  3. int tri(int x){
  4. 	switch(x){
  5. 		case 0:
  6. 		return 0;
  7. 		break;
  8. 		case 1:
  9. 		return 0;
  10. 		break;
  11. 		case 2:
  12. 		return 1;
  13. 		break;
  14. 		default:
  15. 		return tri(x-1)+tri(x-2)+tri(x-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, tri(n));
  24. 	return 0;
  25. }
  26.  
Success #stdin #stdout 0s 5308KB
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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/Yk3acb
language:
C (gcc 8.3)
created:
9 days ago
visibility:
public

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