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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. 		}	
  14.  
  15.  
  16.  
  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 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/4yVgmV
language:
C (gcc 8.3)
created:
10 days ago
visibility:
public

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