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  1. #include <stdio.h>
  2. //練習問題E
  3.  
  4. int tri(int n){
  5. 	if(n==0){
  6. 		return 0;
  7. 	}
  8. 	else if(n==1){
  9. 		return 0;
  10. 	}
  11. 	else if(n==2){
  12. 		return 1;
  13. 	}
  14. 	else{
  15. 		return tri(n-1)+tri(n-2)+tri(n-3);
  16. 	}
  17. }
  18.  
  19.  
  20. int main(void) {
  21. 	int n = 7;
  22.     printf("数列Tnについて, n=%dのときの値は%d\n", n, tri(n));
  23. 	return 0;
  24. }
  25.  
Success #stdin #stdout 0s 5268KB
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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/YU67Yx
language:
C (gcc 8.3)
created:
8 days ago
visibility:
public

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