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  1. #include <stdio.h>
  2. //練習問題E
  3.  
  4. int tri(int n){
  5. 	switch(n){
  6. 		case 0:
  7. 			return 0;
  8.  
  9. 		case 1:
  10. 			return 0;
  11.  
  12. 		case 2:
  13. 			return 1;
  14.  
  15. 		default:
  16. 			return tri(n-1)+tri(n-2)+tri(n-3);
  17. 	}
  18. }
  19.  
  20.  
  21.  
  22. int main(void) {
  23. 	int n = 7;
  24.     printf("数列Tnについて, n=%dのときの値は%d\n", n, tri(n));
  25. 	return 0;
  26. }
  27.  
Success #stdin #stdout 0s 5280KB
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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/LPvore
language:
C (gcc 8.3)
created:
14 days ago
visibility:
public

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