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

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