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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.  
  8. 	if(n==1){
  9. 		return 0;
  10. 	}
  11.  
  12. 	if(n==2){
  13. 		return 1;
  14. 	}
  15.  
  16. 	else
  17. 	return tri(n-1)+tri(n-2)+tri(n-3);
  18. }
  19.  
  20.  
  21.  
  22.  
  23. int main(void) {
  24. 	int n = 7;
  25.     printf("数列Tnについて, n=%dのときの値は%d\n", n, tri(n));
  26. 	return 0;
  27. }
  28.  
Success #stdin #stdout 0s 5320KB
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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/e1ea17
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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