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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. 		if(n == 1){
  8. 			return 0;
  9. 		}
  10. 		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. }
  23.  
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/XSm2ui
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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