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  1. #include <stdio.h>
  2. //練習問題E
  3.  
  4. int tri(int n) {
  5. if (n == 0) return 0;
  6. if (n == 1) return 0;
  7. if (n == 2) return 1;
  8. return tri(n - 1) + tri(n - 2) + tri(n - 3);
  9. }
  10.  
  11.  
  12. int main(void) {
  13. 	int n = 7;
  14.     printf("数列Tnについて, n=%dのときの値は%d\n", n, tri(n));
  15. 	return 0;
  16. }
  17.  
Success #stdin #stdout 0.01s 5288KB
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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/cIrg9x
language:
C (gcc 8.3)
created:
16 days ago
visibility:
public

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