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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. 	else if(n == 1)
  7. 		return 0;
  8. 	else if(n == 2)
  9. 		return 1;
  10. 	else
  11. 		return tri(n - 1)+tri(n - 2)+tri(n - 3);
  12. }
  13. int main(void) {
  14. 	int n = 7;
  15.     printf("数列Tnについて, n=%dのときの値は%d\n", n, tri(n));
  16. 	return 0;
  17. }
  18.  
Success #stdin #stdout 0s 5284KB
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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/fr3t5G
language:
C (gcc 8.3)
created:
8 days ago
visibility:
public

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