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  1. #include <stdio.h>
  2. //練習問題E
  3. int tri(int n) {
  4.     if (n == 0) return 0;
  5.     else if (n == 1) return 0;
  6.     else if (n == 2) return 1;
  7.     else return tri(n - 1) + tri(n - 2) + tri(n - 3);
  8. }
  9.  
  10. int main(void) {
  11. 	int n = 7;
  12.     printf("数列Tnについて, n=%dのときの値は%d\n", n, tri(n));
  13. 	return 0;
  14. }
  15.  
Success #stdin #stdout 0s 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/JtZIx3
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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