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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. 	else if( n==1 )
  8. 	return 0;
  9. 	else if( n==2 )
  10. 	return 1;
  11. 	else
  12. 	return tri(n-1) + tri(n-2) + tri(n-3);
  13. }
  14.  
  15. int main(void) {
  16. 	int n = 7;
  17.     printf("数列Tnについて, n=%dのときの値は%d\n", n, tri(n));
  18. 	return 0;
  19. }
  20.  
Success #stdin #stdout 0.01s 5328KB
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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/DdPNmR
language:
C (gcc 8.3)
created:
7 days ago
visibility:
public

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