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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. 	else if(n==1){
  8. 		return 0;
  9. 	}
  10. 	else if(n==2){
  11. 		return 1;
  12.  
  13. 	}
  14.  
  15. 	else{
  16. 		return tri(n-1)+tri(n-2)+tri(n-3);
  17. 	}
  18.  
  19. }
  20.  
  21.  
  22.  
  23.  
  24.  
  25.  
  26.  
  27.  
  28. int main(void) {
  29. 	int n = 7;
  30. 	int m;
  31. 	m=tri(n);
  32.     printf("数列Tnについて, n=%dのときの値は%d\n", n, tri(n));
  33. 	return 0;
  34. }
  35.  
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/NRP8bx
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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