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

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